diff --git a/CMakeLists.txt b/CMakeLists.txt
index 68231433..e8caedf0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 cmake_minimum_required(VERSION 3.16)
 
 project(FreeKill VERSION 0.0.7)
diff --git a/android/AndroidManifest.xml b/android/AndroidManifest.xml
index 2410e9c2..0efad464 100644
--- a/android/AndroidManifest.xml
+++ b/android/AndroidManifest.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0"?>
+<!-- SPDX-License-Identifier: GPL-3.0-or-later !-->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="org.notify.FreeKill"
   android:installLocation="preferExternal"
diff --git a/android/copy_assets.sh b/android/copy_assets.sh
index 8335c19c..f0bdef48 100755
--- a/android/copy_assets.sh
+++ b/android/copy_assets.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 rm -rf res/mipmap assets
 
diff --git a/android/res/values/styles.xml b/android/res/values/styles.xml
index 74d20974..c197ae96 100644
--- a/android/res/values/styles.xml
+++ b/android/res/values/styles.xml
@@ -1,3 +1,4 @@
+<!-- SPDX-License-Identifier: GPL-3.0-or-later !-->
 <resources>
   <style name="FkTheme" parent="@android:style/Theme.NoTitleBar.Fullscreen">
     <item name="android:windowEnableSplitTouch">false</item>
diff --git a/android/src/org/notify/FreeKill/Helper.java b/android/src/org/notify/FreeKill/Helper.java
index 795573f6..d084f4b4 100644
--- a/android/src/org/notify/FreeKill/Helper.java
+++ b/android/src/org/notify/FreeKill/Helper.java
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package org.notify.FreeKill;
 
 import android.app.Activity;
diff --git a/docs/api/client.rst b/docs/api/client.rst
index 5cd51a1b..2766e15e 100644
--- a/docs/api/client.rst
+++ b/docs/api/client.rst
@@ -1,2 +1,4 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Client
 ============
diff --git a/docs/api/core.rst b/docs/api/core.rst
index 07d64d1a..500eed43 100644
--- a/docs/api/core.rst
+++ b/docs/api/core.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Core
 ========
 
diff --git a/docs/api/core/card.rst b/docs/api/core/card.rst
index 35299e1e..0c2d2628 100644
--- a/docs/api/core/card.rst
+++ b/docs/api/core/card.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Card
 ==============
 
diff --git a/docs/api/core/engine.rst b/docs/api/core/engine.rst
index bc1420ab..e40317a1 100644
--- a/docs/api/core/engine.rst
+++ b/docs/api/core/engine.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Engine
 ==============
 
diff --git a/docs/api/core/game_mode.rst b/docs/api/core/game_mode.rst
index abb1ac4c..ddb33436 100644
--- a/docs/api/core/game_mode.rst
+++ b/docs/api/core/game_mode.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 GameMode
 ==============
 
diff --git a/docs/api/core/general.rst b/docs/api/core/general.rst
index cd739381..19321e22 100644
--- a/docs/api/core/general.rst
+++ b/docs/api/core/general.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 General
 ==============
 
diff --git a/docs/api/core/package.rst b/docs/api/core/package.rst
index 273ff3dd..c7a57d07 100644
--- a/docs/api/core/package.rst
+++ b/docs/api/core/package.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Package
 ==============
 
diff --git a/docs/api/core/player.rst b/docs/api/core/player.rst
index 996b7114..ae089695 100644
--- a/docs/api/core/player.rst
+++ b/docs/api/core/player.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Player
 ==============
 
diff --git a/docs/api/core/skill.rst b/docs/api/core/skill.rst
index 8ef04e3d..9019726a 100644
--- a/docs/api/core/skill.rst
+++ b/docs/api/core/skill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Skill
 ==============
 
diff --git a/docs/api/index.rst b/docs/api/index.rst
index 69326107..c588d4bd 100644
--- a/docs/api/index.rst
+++ b/docs/api/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 API文档
 ============
 
diff --git a/docs/api/server.rst b/docs/api/server.rst
index 0d295118..c8f77ff4 100644
--- a/docs/api/server.rst
+++ b/docs/api/server.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Server
 ============
 
diff --git a/docs/api/server/room.rst b/docs/api/server/room.rst
index 7410117d..ee133a3d 100644
--- a/docs/api/server/room.rst
+++ b/docs/api/server/room.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Room
 =============
 
diff --git a/docs/dev/ai.rst b/docs/dev/ai.rst
index 17c21695..27c93aa7 100644
--- a/docs/dev/ai.rst
+++ b/docs/dev/ai.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FreeKill 的 AI 系统
 ===================
 
diff --git a/docs/dev/compile.rst b/docs/dev/compile.rst
index 2cd9ec10..8544c284 100644
--- a/docs/dev/compile.rst
+++ b/docs/dev/compile.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 编译 FreeKill
 =============
 
diff --git a/docs/dev/database.rst b/docs/dev/database.rst
index 4cfab213..4d2139df 100644
--- a/docs/dev/database.rst
+++ b/docs/dev/database.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FreeKill 的数据库
 =================
 
diff --git a/docs/dev/gameevent.rst b/docs/dev/gameevent.rst
index d3223acc..8aebfec5 100644
--- a/docs/dev/gameevent.rst
+++ b/docs/dev/gameevent.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Fk的游戏事件
 ============
 
diff --git a/docs/dev/gamelogic.rst b/docs/dev/gamelogic.rst
index 5d950c0a..65791984 100644
--- a/docs/dev/gamelogic.rst
+++ b/docs/dev/gamelogic.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 游戏逻辑
 ========
 
diff --git a/docs/dev/index.rst b/docs/dev/index.rst
index edb2ac51..23666dd0 100644
--- a/docs/dev/index.rst
+++ b/docs/dev/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Dev文档
 ============
 
diff --git a/docs/dev/package.rst b/docs/dev/package.rst
index 94371e8c..812351eb 100644
--- a/docs/dev/package.rst
+++ b/docs/dev/package.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FreeKill 的包管理策略
 =====================
 
diff --git a/docs/dev/protocol.rst b/docs/dev/protocol.rst
index 64359625..e42e958a 100644
--- a/docs/dev/protocol.rst
+++ b/docs/dev/protocol.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FreeKill 的通信
 ===============
 
diff --git a/docs/dev/scenario.rst b/docs/dev/scenario.rst
index 67b59dfc..8e8cad21 100644
--- a/docs/dev/scenario.rst
+++ b/docs/dev/scenario.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 关于扩展FreeKill玩法的思考
 ==========================
 
diff --git a/docs/dev/todo.rst b/docs/dev/todo.rst
index 54efe6a3..6411aa57 100644
--- a/docs/dev/todo.rst
+++ b/docs/dev/todo.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 TODO list
 =========
 
diff --git a/docs/dev/ui.rst b/docs/dev/ui.rst
index 4bb23120..014ad262 100644
--- a/docs/dev/ui.rst
+++ b/docs/dev/ui.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FreeKill 的UI
 =============
 
diff --git a/docs/diy/01-env.rst b/docs/diy/01-env.rst
index 9d0e140b..bcd5e6a8 100644
--- a/docs/diy/01-env.rst
+++ b/docs/diy/01-env.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Fk DIY - 环境搭建
 =================
 
diff --git a/docs/diy/02-skilltype.rst b/docs/diy/02-skilltype.rst
index cb4408b2..f085636d 100644
--- a/docs/diy/02-skilltype.rst
+++ b/docs/diy/02-skilltype.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 fk技能类型总览
 ==============
 
diff --git a/docs/diy/03-events.rst b/docs/diy/03-events.rst
index 7bc68d53..5ca27f71 100644
--- a/docs/diy/03-events.rst
+++ b/docs/diy/03-events.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 fk中的游戏事件
 ==============
 
diff --git a/docs/diy/03-newgeneral.rst b/docs/diy/03-newgeneral.rst
index 4e649b3a..a59fb27f 100644
--- a/docs/diy/03-newgeneral.rst
+++ b/docs/diy/03-newgeneral.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 创建武将并添加技能
 ==================
 
diff --git a/docs/diy/04-newskill.rst b/docs/diy/04-newskill.rst
index 9cc579b4..b1fbaf68 100644
--- a/docs/diy/04-newskill.rst
+++ b/docs/diy/04-newskill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 创建新技能
 ==========
 
diff --git a/docs/diy/05-trigger.rst b/docs/diy/05-trigger.rst
index b1fd10a5..6f84f8b7 100644
--- a/docs/diy/05-trigger.rst
+++ b/docs/diy/05-trigger.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 技能解析：触发技
 ======================
 
diff --git a/docs/diy/06-active.rst b/docs/diy/06-active.rst
index 83309db5..8226e112 100644
--- a/docs/diy/06-active.rst
+++ b/docs/diy/06-active.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 技能解析：主动技
 ================
 
diff --git a/docs/diy/event/gameflow.rst b/docs/diy/event/gameflow.rst
index 66f7a881..5076bc5e 100644
--- a/docs/diy/event/gameflow.rst
+++ b/docs/diy/event/gameflow.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 与游戏流程有关的事件
 ====================
 
diff --git a/docs/diy/event/hp.rst b/docs/diy/event/hp.rst
index 03f8ccc2..17e63cb1 100644
--- a/docs/diy/event/hp.rst
+++ b/docs/diy/event/hp.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 与体力值相关的事件
 ==================
 
diff --git a/docs/diy/event/misc.rst b/docs/diy/event/misc.rst
index 74edbb22..1dc92cc6 100644
--- a/docs/diy/event/misc.rst
+++ b/docs/diy/event/misc.rst
@@ -1,2 +1,4 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 杂项事件
 =============
diff --git a/docs/diy/event/movecard.rst b/docs/diy/event/movecard.rst
index 34d4e4e8..0d225b64 100644
--- a/docs/diy/event/movecard.rst
+++ b/docs/diy/event/movecard.rst
@@ -1,2 +1,4 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 移动牌相关的事件
 =====================
diff --git a/docs/diy/event/usecard.rst b/docs/diy/event/usecard.rst
index f0596449..f08b2ae8 100644
--- a/docs/diy/event/usecard.rst
+++ b/docs/diy/event/usecard.rst
@@ -1,2 +1,4 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 使用牌相关的事件
 ====================
diff --git a/docs/diy/index.rst b/docs/diy/index.rst
index 7b1d17f7..ff87a7bd 100644
--- a/docs/diy/index.rst
+++ b/docs/diy/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 Diy文档
 ===============
 
diff --git a/docs/fkp/dev/add_more_action.rst b/docs/fkp/dev/add_more_action.rst
index ea8d5b30..258dd687 100644
--- a/docs/fkp/dev/add_more_action.rst
+++ b/docs/fkp/dev/add_more_action.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 添加更多的动作语句
 ==================
 
diff --git a/docs/fkp/dev/build_from_source.rst b/docs/fkp/dev/build_from_source.rst
index 23f651a9..3c061d28 100644
--- a/docs/fkp/dev/build_from_source.rst
+++ b/docs/fkp/dev/build_from_source.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 编译fkparse
 ===========
 
diff --git a/docs/fkp/dev/how_does_it_work.rst b/docs/fkp/dev/how_does_it_work.rst
index dd27ff11..692750ff 100644
--- a/docs/fkp/dev/how_does_it_work.rst
+++ b/docs/fkp/dev/how_does_it_work.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 fkparse的运行原理
 =================
 
diff --git a/docs/fkp/dev/index.rst b/docs/fkp/dev/index.rst
index 81d8d4f1..096bb7fe 100644
--- a/docs/fkp/dev/index.rst
+++ b/docs/fkp/dev/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FKP开发者指南
 =============
 
diff --git a/docs/fkp/ref/all_action.rst b/docs/fkp/ref/all_action.rst
index 55519aec..cb77f46e 100644
--- a/docs/fkp/ref/all_action.rst
+++ b/docs/fkp/ref/all_action.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 所有的动作语句
 ==============
 
diff --git a/docs/fkp/ref/all_event.rst b/docs/fkp/ref/all_event.rst
index 758a20c0..2cd21c2a 100644
--- a/docs/fkp/ref/all_event.rst
+++ b/docs/fkp/ref/all_event.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 所有触发时机
 ============
 
diff --git a/docs/fkp/ref/all_function.rst b/docs/fkp/ref/all_function.rst
index 4bce3ffd..12f77410 100644
--- a/docs/fkp/ref/all_function.rst
+++ b/docs/fkp/ref/all_function.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 所有的预定义函数
 ================
 
diff --git a/docs/fkp/ref/all_lexical.rst b/docs/fkp/ref/all_lexical.rst
index a0afb5b5..24e8610d 100644
--- a/docs/fkp/ref/all_lexical.rst
+++ b/docs/fkp/ref/all_lexical.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 所有词法单元
 ============
 
diff --git a/docs/fkp/ref/all_property.rst b/docs/fkp/ref/all_property.rst
index dc8ae402..5de6807b 100644
--- a/docs/fkp/ref/all_property.rst
+++ b/docs/fkp/ref/all_property.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 类型可以获取的属性
 ==================
 
diff --git a/docs/fkp/ref/all_var.rst b/docs/fkp/ref/all_var.rst
index f29c2dab..68394085 100644
--- a/docs/fkp/ref/all_var.rst
+++ b/docs/fkp/ref/all_var.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 所有的预定义变量
 ================
 
diff --git a/docs/fkp/ref/cn_en.rst b/docs/fkp/ref/cn_en.rst
index 19503359..12250296 100644
--- a/docs/fkp/ref/cn_en.rst
+++ b/docs/fkp/ref/cn_en.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 关键词中英文对照
 ================
 
diff --git a/docs/fkp/ref/index.rst b/docs/fkp/ref/index.rst
index 47683fd9..2c62dada 100644
--- a/docs/fkp/ref/index.rst
+++ b/docs/fkp/ref/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FKP参考手册
 ===========
 
diff --git a/docs/fkp/usr/active_skill.rst b/docs/fkp/usr/active_skill.rst
index f7972c2d..845e0992 100644
--- a/docs/fkp/usr/active_skill.rst
+++ b/docs/fkp/usr/active_skill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 主动技能
 ========
 
diff --git a/docs/fkp/usr/basic_grammar.rst b/docs/fkp/usr/basic_grammar.rst
index aa5d7134..e06e2c76 100644
--- a/docs/fkp/usr/basic_grammar.rst
+++ b/docs/fkp/usr/basic_grammar.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 基本语法
 ========
 
diff --git a/docs/fkp/usr/create_general.rst b/docs/fkp/usr/create_general.rst
index ec3e3b17..dfa6066b 100644
--- a/docs/fkp/usr/create_general.rst
+++ b/docs/fkp/usr/create_general.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 创建武将
 ========
 
diff --git a/docs/fkp/usr/create_skill.rst b/docs/fkp/usr/create_skill.rst
index 1ef9e538..f4ac0f7e 100644
--- a/docs/fkp/usr/create_skill.rst
+++ b/docs/fkp/usr/create_skill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 创建技能
 ========
 
diff --git a/docs/fkp/usr/exp_stat.rst b/docs/fkp/usr/exp_stat.rst
index 857013cc..b1cea521 100644
--- a/docs/fkp/usr/exp_stat.rst
+++ b/docs/fkp/usr/exp_stat.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 表达式和语句
 ============
 
diff --git a/docs/fkp/usr/func_array.rst b/docs/fkp/usr/func_array.rst
index d583f9b9..7163d4e2 100644
--- a/docs/fkp/usr/func_array.rst
+++ b/docs/fkp/usr/func_array.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 函数定义和调用，以及数组
 ========================
 
diff --git a/docs/fkp/usr/get_started.rst b/docs/fkp/usr/get_started.rst
index 18ead872..1386d4c5 100644
--- a/docs/fkp/usr/get_started.rst
+++ b/docs/fkp/usr/get_started.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 开始使用
 ========
 
diff --git a/docs/fkp/usr/index.rst b/docs/fkp/usr/index.rst
index ba6da52a..cb9750cf 100644
--- a/docs/fkp/usr/index.rst
+++ b/docs/fkp/usr/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 FKP用户指南
 ===========
 
diff --git a/docs/fkp/usr/intro.rst b/docs/fkp/usr/intro.rst
index e0b574fc..0ea9c6fe 100644
--- a/docs/fkp/usr/intro.rst
+++ b/docs/fkp/usr/intro.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 fkparse简介
 ===========
 
diff --git a/docs/fkp/usr/status_skill.rst b/docs/fkp/usr/status_skill.rst
index 757a6761..eff76dee 100644
--- a/docs/fkp/usr/status_skill.rst
+++ b/docs/fkp/usr/status_skill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 状态技
 ======
 
diff --git a/docs/fkp/usr/style.rst b/docs/fkp/usr/style.rst
index 8b137891..ec11cc32 100644
--- a/docs/fkp/usr/style.rst
+++ b/docs/fkp/usr/style.rst
@@ -1 +1,3 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 
diff --git a/docs/fkp/usr/viewas_skill.rst b/docs/fkp/usr/viewas_skill.rst
index 21e19ae2..d5f7d2e0 100644
--- a/docs/fkp/usr/viewas_skill.rst
+++ b/docs/fkp/usr/viewas_skill.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 视为技能
 ========
 
diff --git a/docs/index.rst b/docs/index.rst
index 88759a09..17b6f119 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 .. FreeKill documentation master file, created by
    sphinx-quickstart on Sun Mar 26 02:58:53 2023.
    You can adapt this file completely to your liking, but it should at least
diff --git a/docs/makebook.sh b/docs/makebook.sh
index 61640cf2..5c565eeb 100755
--- a/docs/makebook.sh
+++ b/docs/makebook.sh
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 #!/bin/bash
 
 TEX_FILE=manual.tex
diff --git a/docs/usr/00-download.rst b/docs/usr/00-download.rst
index f32d7a59..cc29d2dc 100644
--- a/docs/usr/00-download.rst
+++ b/docs/usr/00-download.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 下载FK
 ========
 
diff --git a/docs/usr/01-play.rst b/docs/usr/01-play.rst
index 5ada72e4..e71fb04d 100644
--- a/docs/usr/01-play.rst
+++ b/docs/usr/01-play.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 游玩FK
 ========
 
diff --git a/docs/usr/02-connect.rst b/docs/usr/02-connect.rst
index 0c92db36..14bd1cb1 100644
--- a/docs/usr/02-connect.rst
+++ b/docs/usr/02-connect.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 联机游玩FK
 ===========
 
diff --git a/docs/usr/03-package.rst b/docs/usr/03-package.rst
index 4a165a91..c9a4029b 100644
--- a/docs/usr/03-package.rst
+++ b/docs/usr/03-package.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 拓展包管理
 ===========
 
diff --git a/docs/usr/index.rst b/docs/usr/index.rst
index 556d1e7b..fc564c0a 100644
--- a/docs/usr/index.rst
+++ b/docs/usr/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GFDL-1.3-or-later
+
 入门FK
 ========
 
diff --git a/lua/client/client.lua b/lua/client/client.lua
index 65ca82e5..3385247e 100644
--- a/lua/client/client.lua
+++ b/lua/client/client.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class Client
 ---@field public client fk.Client
 ---@field public players ClientPlayer[]
diff --git a/lua/client/client_util.lua b/lua/client/client_util.lua
index f62e5d76..b02cb497 100644
--- a/lua/client/client_util.lua
+++ b/lua/client/client_util.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- All functions in this file are used by Qml
 
 function Translate(src)
diff --git a/lua/client/clientplayer.lua b/lua/client/clientplayer.lua
index 365a20f3..3209bf87 100644
--- a/lua/client/clientplayer.lua
+++ b/lua/client/clientplayer.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class ClientPlayer: Player
 ---@field public player fk.Player
 ---@field public known_cards integer[]
diff --git a/lua/client/i18n/en_US.lua b/lua/client/i18n/en_US.lua
index e8790fb5..ee7ab1e3 100644
--- a/lua/client/i18n/en_US.lua
+++ b/lua/client/i18n/en_US.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable({
   -- Lobby
   -- ["Room List"] = "房间列表",
diff --git a/lua/client/i18n/init.lua b/lua/client/i18n/init.lua
index 4a87adf7..ab403392 100644
--- a/lua/client/i18n/init.lua
+++ b/lua/client/i18n/init.lua
@@ -1,2 +1,4 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 dofile "lua/client/i18n/zh_CN.lua"
 dofile "lua/client/i18n/en_US.lua"
diff --git a/lua/client/i18n/zh_CN.lua b/lua/client/i18n/zh_CN.lua
index 60d0db59..6ca8daa3 100644
--- a/lua/client/i18n/zh_CN.lua
+++ b/lua/client/i18n/zh_CN.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable{
   -- Lobby
   ["Room List"] = "房间列表",
diff --git a/lua/core/card.lua b/lua/core/card.lua
index d984c5ad..75ef8bc2 100644
--- a/lua/core/card.lua
+++ b/lua/core/card.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --- Card记录了FreeKill所有卡牌的基础信息。
 ---
 --- 它包含了ID、所属包、牌名、花色、点数等等
diff --git a/lua/core/card_type/basic.lua b/lua/core/card_type/basic.lua
index e969713f..24b82f35 100644
--- a/lua/core/card_type/basic.lua
+++ b/lua/core/card_type/basic.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class BasicCard : Card
 local BasicCard = Card:subclass("BasicCard")
 
diff --git a/lua/core/card_type/equip.lua b/lua/core/card_type/equip.lua
index 1b474cfb..c3491d89 100644
--- a/lua/core/card_type/equip.lua
+++ b/lua/core/card_type/equip.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class EquipCard : Card
 ---@field public equip_skill Skill
 local EquipCard = Card:subclass("EquipCard")
diff --git a/lua/core/card_type/trick.lua b/lua/core/card_type/trick.lua
index 0c366e68..cb5cab8f 100644
--- a/lua/core/card_type/trick.lua
+++ b/lua/core/card_type/trick.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class TrickCard : Card
 local TrickCard = Card:subclass("TrickCard")
 
diff --git a/lua/core/debug.lua b/lua/core/debug.lua
index 63d4de33..bd24e462 100644
--- a/lua/core/debug.lua
+++ b/lua/core/debug.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@diagnostic disable: lowercase-global
 inspect = require "inspect"
 
diff --git a/lua/core/engine.lua b/lua/core/engine.lua
index 7223999a..cb1cb595 100644
--- a/lua/core/engine.lua
+++ b/lua/core/engine.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --- Engine是整个FreeKill赖以运行的核心。
 ---
 --- 它包含了FreeKill涉及的所有武将、卡牌、游戏模式等等
diff --git a/lua/core/exppattern.lua b/lua/core/exppattern.lua
index a949b85d..7102b28d 100644
--- a/lua/core/exppattern.lua
+++ b/lua/core/exppattern.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --[[
 
   Exppattern is a string that describes cards of a same 'type', e.g. name,
diff --git a/lua/core/game_mode.lua b/lua/core/game_mode.lua
index 44729729..a924f11a 100644
--- a/lua/core/game_mode.lua
+++ b/lua/core/game_mode.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class GameMode: Object
 ---@field public name string
 ---@field public minPlayer integer
diff --git a/lua/core/general.lua b/lua/core/general.lua
index 5a95439b..1fc221e3 100644
--- a/lua/core/general.lua
+++ b/lua/core/general.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class General : Object
 ---@field public package Package
 ---@field public name string
diff --git a/lua/core/package.lua b/lua/core/package.lua
index cc560fff..d0b0e71d 100644
--- a/lua/core/package.lua
+++ b/lua/core/package.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --- Package用来描述一个FreeKill拓展包。
 ---
 --- 所谓拓展包，就是武将/卡牌/游戏模式的一个集合而已。
diff --git a/lua/core/player.lua b/lua/core/player.lua
index 4627dcde..035f9fae 100644
--- a/lua/core/player.lua
+++ b/lua/core/player.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --- 玩家分为客户端要处理的玩家，以及服务端处理的玩家两种。
 ---
 --- 客户端能知道的玩家的信息十分有限，而服务端知道一名玩家的所有细节。
diff --git a/lua/core/skill.lua b/lua/core/skill.lua
index 10926d88..cfe2f2dd 100644
--- a/lua/core/skill.lua
+++ b/lua/core/skill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class Skill : Object
 ---@field public name string
 ---@field public trueName string
diff --git a/lua/core/skill_type/active.lua b/lua/core/skill_type/active.lua
index 4fa2df60..4b5243b2 100644
--- a/lua/core/skill_type/active.lua
+++ b/lua/core/skill_type/active.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class ActiveSkill : UsableSkill
 ---@field public min_target_num integer
 ---@field public max_target_num integer
diff --git a/lua/core/skill_type/attack_range.lua b/lua/core/skill_type/attack_range.lua
index 395b429b..1c8a62bd 100644
--- a/lua/core/skill_type/attack_range.lua
+++ b/lua/core/skill_type/attack_range.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class AttackRangeSkill : StatusSkill
 local AttackRangeSkill = StatusSkill:subclass("AttackRangeSkill")
 
diff --git a/lua/core/skill_type/distance.lua b/lua/core/skill_type/distance.lua
index 694f8066..fe2ee7eb 100644
--- a/lua/core/skill_type/distance.lua
+++ b/lua/core/skill_type/distance.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class DistanceSkill : StatusSkill
 local DistanceSkill = StatusSkill:subclass("DistanceSkill")
 
diff --git a/lua/core/skill_type/filter.lua b/lua/core/skill_type/filter.lua
index 8e39b3fc..6996973d 100644
--- a/lua/core/skill_type/filter.lua
+++ b/lua/core/skill_type/filter.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class FilterSkill: StatusSkill
 local FilterSkill = StatusSkill:subclass("FilterSkill")
 
diff --git a/lua/core/skill_type/invalidity.lua b/lua/core/skill_type/invalidity.lua
index 0751ce2e..7b051c0a 100644
--- a/lua/core/skill_type/invalidity.lua
+++ b/lua/core/skill_type/invalidity.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class InvaliditySkill : StatusSkill
 local InvaliditySkill = StatusSkill:subclass("InvaliditySkill")
 
diff --git a/lua/core/skill_type/max_cards.lua b/lua/core/skill_type/max_cards.lua
index a31a264a..3b3538b7 100644
--- a/lua/core/skill_type/max_cards.lua
+++ b/lua/core/skill_type/max_cards.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class MaxCardsSkill : StatusSkill
 local MaxCardsSkill = StatusSkill:subclass("MaxCardsSkill")
 
diff --git a/lua/core/skill_type/prohibit.lua b/lua/core/skill_type/prohibit.lua
index 55824231..589a8158 100644
--- a/lua/core/skill_type/prohibit.lua
+++ b/lua/core/skill_type/prohibit.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class ProhibitSkill : StatusSkill
 local ProhibitSkill = StatusSkill:subclass("ProhibitSkill")
 
diff --git a/lua/core/skill_type/status_skill.lua b/lua/core/skill_type/status_skill.lua
index 7bf2df30..7b685d34 100644
--- a/lua/core/skill_type/status_skill.lua
+++ b/lua/core/skill_type/status_skill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class StatusSkill : Skill
 ---@field public global boolean
 local StatusSkill = Skill:subclass("StatusSkill")
diff --git a/lua/core/skill_type/target_mod.lua b/lua/core/skill_type/target_mod.lua
index afdb1fd1..3e61fadc 100644
--- a/lua/core/skill_type/target_mod.lua
+++ b/lua/core/skill_type/target_mod.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class TargetModSkill : StatusSkill
 local TargetModSkill = StatusSkill:subclass("TargetModSkill")
 
diff --git a/lua/core/skill_type/trigger.lua b/lua/core/skill_type/trigger.lua
index 3841f9cd..4af4dda1 100644
--- a/lua/core/skill_type/trigger.lua
+++ b/lua/core/skill_type/trigger.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class TriggerSkill : UsableSkill
 ---@field public global boolean
 ---@field public events Event[]
diff --git a/lua/core/skill_type/usable_skill.lua b/lua/core/skill_type/usable_skill.lua
index efb62aac..24748c3f 100644
--- a/lua/core/skill_type/usable_skill.lua
+++ b/lua/core/skill_type/usable_skill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class UsableSkill : Skill
 ---@field public max_use_time integer[]
 ---@field public expand_pile string
diff --git a/lua/core/skill_type/view_as.lua b/lua/core/skill_type/view_as.lua
index 92d795ef..8e3df9e8 100644
--- a/lua/core/skill_type/view_as.lua
+++ b/lua/core/skill_type/view_as.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class ViewAsSkill : UsableSkill
 ---@field public pattern string @ cards that can be viewAs'ed by this skill
 ---@field public interaction any
diff --git a/lua/core/util.lua b/lua/core/util.lua
index 1f3e02e8..541f53a0 100644
--- a/lua/core/util.lua
+++ b/lua/core/util.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- the iterator of QList object
 local qlist_iterator = function(list, n)
   if n < list:length() - 1 then
diff --git a/lua/fk_ex.lua b/lua/fk_ex.lua
index d4883f4a..59c6e3dd 100644
--- a/lua/fk_ex.lua
+++ b/lua/fk_ex.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- load types for extension
 
 dofile "lua/server/event.lua"
diff --git a/lua/freekill.lua b/lua/freekill.lua
index 13551d88..14250240 100644
--- a/lua/freekill.lua
+++ b/lua/freekill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- Fundemental script for FreeKill
 -- Load mods, init the engine, etc.
 
diff --git a/lua/lsp/freekill.lua b/lua/lsp/freekill.lua
index cad8122c..5ed6e4d6 100644
--- a/lua/lsp/freekill.lua
+++ b/lua/lsp/freekill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 -- Note: these files are not used by FreeKill.
diff --git a/lua/lsp/lib.lua b/lua/lsp/lib.lua
index 15664d7d..63a64e5b 100644
--- a/lua/lsp/lib.lua
+++ b/lua/lsp/lib.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 ---@class class
diff --git a/lua/lsp/player.lua b/lua/lsp/player.lua
index 584fbce3..2dc130e1 100644
--- a/lua/lsp/player.lua
+++ b/lua/lsp/player.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 ---@class fk.Player
diff --git a/lua/lsp/qt.lua b/lua/lsp/qt.lua
index 1ebcc606..cc257f50 100644
--- a/lua/lsp/qt.lua
+++ b/lua/lsp/qt.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 ---@return integer length
diff --git a/lua/lsp/server.lua b/lua/lsp/server.lua
index f24db095..7f99a263 100644
--- a/lua/lsp/server.lua
+++ b/lua/lsp/server.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 ---@class fk.Server
diff --git a/lua/lsp/sqlite.lua b/lua/lsp/sqlite.lua
index 4a5b39ce..23145ce7 100644
--- a/lua/lsp/sqlite.lua
+++ b/lua/lsp/sqlite.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@meta
 
 ---@class fk.SQLite3
diff --git a/lua/server/ai/ai.lua b/lua/server/ai/ai.lua
index d8f6c5bf..b6f50d59 100644
--- a/lua/server/ai/ai.lua
+++ b/lua/server/ai/ai.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- AI base class.
 -- Do nothing.
 
diff --git a/lua/server/ai/init.lua b/lua/server/ai/init.lua
index 5cc38595..8426698b 100644
--- a/lua/server/ai/init.lua
+++ b/lua/server/ai/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 AI = require "server.ai.ai"
 TrustAI = require "server.ai.trust_ai"
 RandomAI = require "server.ai.random_ai"
diff --git a/lua/server/ai/mcts.lua b/lua/server/ai/mcts.lua
index 79a417d7..956f524b 100644
--- a/lua/server/ai/mcts.lua
+++ b/lua/server/ai/mcts.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local MonteCarlo = class("MonteCarlo")
 
 
diff --git a/lua/server/ai/random_ai.lua b/lua/server/ai/random_ai.lua
index d1a52770..52473947 100644
--- a/lua/server/ai/random_ai.lua
+++ b/lua/server/ai/random_ai.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class RandomAI: AI
 local RandomAI = AI:subclass("RandomAI")
 
diff --git a/lua/server/ai/trust_ai.lua b/lua/server/ai/trust_ai.lua
index 4079e059..152e6a1d 100644
--- a/lua/server/ai/trust_ai.lua
+++ b/lua/server/ai/trust_ai.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- Trust AI
 
 ---@class TrustAI: AI
diff --git a/lua/server/event.lua b/lua/server/event.lua
index d6fc45d2..9099f6cd 100644
--- a/lua/server/event.lua
+++ b/lua/server/event.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@alias Event integer
 
 fk.NonTrigger = 1
diff --git a/lua/server/events/death.lua b/lua/server/events/death.lua
index 75ddd7b3..f3df747f 100644
--- a/lua/server/events/death.lua
+++ b/lua/server/events/death.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.Dying] = function(self)
   local dyingStruct = table.unpack(self.data)
   local self = self.room
diff --git a/lua/server/events/gameflow.lua b/lua/server/events/gameflow.lua
index 927ca2c7..8168b020 100644
--- a/lua/server/events/gameflow.lua
+++ b/lua/server/events/gameflow.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.DrawInitial] = function(self)
   local room = self.room
   for _, p in ipairs(room.alive_players) do
diff --git a/lua/server/events/hp.lua b/lua/server/events/hp.lua
index 6bfc801e..1643fef3 100644
--- a/lua/server/events/hp.lua
+++ b/lua/server/events/hp.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.ChangeHp] = function(self)
   local player, num, reason, skillName, damageStruct = table.unpack(self.data)
   local self = self.room
diff --git a/lua/server/events/init.lua b/lua/server/events/init.lua
index 96aa9987..a72a0fb5 100644
--- a/lua/server/events/init.lua
+++ b/lua/server/events/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- Definitions of game events
 
 GameEvent.ChangeHp = 1
diff --git a/lua/server/events/judge.lua b/lua/server/events/judge.lua
index c9681c46..5e33b28c 100644
--- a/lua/server/events/judge.lua
+++ b/lua/server/events/judge.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.Judge] = function(self)
   local data = table.unpack(self.data)
   local self = self.room
diff --git a/lua/server/events/movecard.lua b/lua/server/events/movecard.lua
index 346cadae..75474ff3 100644
--- a/lua/server/events/movecard.lua
+++ b/lua/server/events/movecard.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.MoveCards] = function(self)
   local args = self.data
   local self = self.room
diff --git a/lua/server/events/pindian.lua b/lua/server/events/pindian.lua
index 83109175..b483c461 100644
--- a/lua/server/events/pindian.lua
+++ b/lua/server/events/pindian.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.Pindian] = function(self)
   local pindianData = table.unpack(self.data)
   local self = self.room
diff --git a/lua/server/events/skill.lua b/lua/server/events/skill.lua
index 9e3a1419..dd1a8d81 100644
--- a/lua/server/events/skill.lua
+++ b/lua/server/events/skill.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 GameEvent.functions[GameEvent.SkillEffect] = function(self)
   local effect_cb = table.unpack(self.data)
   return effect_cb()
diff --git a/lua/server/events/usecard.lua b/lua/server/events/usecard.lua
index fc7f275d..5197e0b2 100644
--- a/lua/server/events/usecard.lua
+++ b/lua/server/events/usecard.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local playCardEmotionAndSound = function(room, player, card)
   if card.type ~= Card.TypeEquip then
     local anim_path = "./packages/" .. card.package.extensionName .. "/image/anim/" .. card.name
diff --git a/lua/server/gameevent.lua b/lua/server/gameevent.lua
index c6794d27..54db591f 100644
--- a/lua/server/gameevent.lua
+++ b/lua/server/gameevent.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class GameEvent: Object
 ---@field public room Room
 ---@field public event integer
diff --git a/lua/server/gamelogic.lua b/lua/server/gamelogic.lua
index 237c0961..7e9bf14c 100644
--- a/lua/server/gamelogic.lua
+++ b/lua/server/gamelogic.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class GameLogic: Object
 ---@field public room Room
 ---@field public skill_table table<Event, TriggerSkill[]>
diff --git a/lua/server/room.lua b/lua/server/room.lua
index 9381696e..cacfb225 100644
--- a/lua/server/room.lua
+++ b/lua/server/room.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 --- Room是fk游戏逻辑运行的主要场所，同时也提供了许多API函数供编写技能使用。
 ---
 --- 一个房间中只有一个Room实例，保存在RoomInstance全局变量中。
diff --git a/lua/server/serverplayer.lua b/lua/server/serverplayer.lua
index 6a4e39a5..fc57c507 100644
--- a/lua/server/serverplayer.lua
+++ b/lua/server/serverplayer.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class ServerPlayer : Player
 ---@field public serverplayer fk.ServerPlayer
 ---@field public room Room
diff --git a/lua/server/system_enum.lua b/lua/server/system_enum.lua
index 2dd9a1a5..2144fc84 100644
--- a/lua/server/system_enum.lua
+++ b/lua/server/system_enum.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@class CardsMoveInfo
 ---@field public ids integer[]
 ---@field public from integer|null
diff --git a/lua/ui-util.lua b/lua/ui-util.lua
index e5e1eb20..11f642c9 100644
--- a/lua/ui-util.lua
+++ b/lua/ui-util.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 -- 主动技/视为技用。
 -- 能创造一个简单的组件供UI使用。
 
diff --git a/packages/init.sql b/packages/init.sql
index 7c045542..5416095a 100644
--- a/packages/init.sql
+++ b/packages/init.sql
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+
 CREATE TABLE packages (
   name VARCHAR(128),
   url VARCHAR(255),
diff --git a/packages/maneuvering/init.lua b/packages/maneuvering/init.lua
index 62f35163..e9f8167d 100644
--- a/packages/maneuvering/init.lua
+++ b/packages/maneuvering/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local extension = Package:new("maneuvering", Package.CardPack)
 
 local slash = Fk:cloneCard("slash")
diff --git a/packages/standard/aux_skills.lua b/packages/standard/aux_skills.lua
index 269b86b1..12b734dc 100644
--- a/packages/standard/aux_skills.lua
+++ b/packages/standard/aux_skills.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local discardSkill = fk.CreateActiveSkill{
   name = "discard_skill",
   card_filter = function(self, to_select, selected)
diff --git a/packages/standard/game_rule.lua b/packages/standard/game_rule.lua
index d7e323bc..a1607e79 100644
--- a/packages/standard/game_rule.lua
+++ b/packages/standard/game_rule.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 ---@param victim ServerPlayer
 local function getWinner(victim)
   local room = victim.room
diff --git a/packages/standard/i18n/en_US.lua b/packages/standard/i18n/en_US.lua
index d521a089..5c80ceb6 100644
--- a/packages/standard/i18n/en_US.lua
+++ b/packages/standard/i18n/en_US.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable({
   ["standard"] = "Standard",
   ["wei"] = "Wei",
diff --git a/packages/standard/i18n/init.lua b/packages/standard/i18n/init.lua
index 34288c01..35299a1c 100644
--- a/packages/standard/i18n/init.lua
+++ b/packages/standard/i18n/init.lua
@@ -1,2 +1,4 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 dofile "packages/standard/i18n/zh_CN.lua"
 dofile "packages/standard/i18n/en_US.lua"
diff --git a/packages/standard/i18n/zh_CN.lua b/packages/standard/i18n/zh_CN.lua
index b57ba635..9e28bd11 100644
--- a/packages/standard/i18n/zh_CN.lua
+++ b/packages/standard/i18n/zh_CN.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable{
   ["standard"] = "标准包",
   ["wei"] = "魏",
diff --git a/packages/standard/init.lua b/packages/standard/init.lua
index b987fa41..c760e6ed 100644
--- a/packages/standard/init.lua
+++ b/packages/standard/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local extension = Package:new("standard")
 extension.metadata = require "packages.standard.metadata"
 dofile "packages/standard/game_rule.lua"
diff --git a/packages/standard/metadata.lua b/packages/standard/metadata.lua
index e4c0793f..8a9c4475 100644
--- a/packages/standard/metadata.lua
+++ b/packages/standard/metadata.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 return {
   name = "standard",
   author = "official",
diff --git a/packages/standard_cards/i18n/en_US.lua b/packages/standard_cards/i18n/en_US.lua
index 0721e7db..150717ed 100644
--- a/packages/standard_cards/i18n/en_US.lua
+++ b/packages/standard_cards/i18n/en_US.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable({
   ["standard_cards"] = "Standard",
 
diff --git a/packages/standard_cards/i18n/init.lua b/packages/standard_cards/i18n/init.lua
index f655dc82..d0d0cfa3 100644
--- a/packages/standard_cards/i18n/init.lua
+++ b/packages/standard_cards/i18n/init.lua
@@ -1,2 +1,4 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 dofile "packages/standard_cards/i18n/zh_CN.lua"
 dofile "packages/standard_cards/i18n/en_US.lua"
diff --git a/packages/standard_cards/i18n/zh_CN.lua b/packages/standard_cards/i18n/zh_CN.lua
index 99909dac..54ab41dd 100644
--- a/packages/standard_cards/i18n/zh_CN.lua
+++ b/packages/standard_cards/i18n/zh_CN.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 Fk:loadTranslationTable{
   ["standard_cards"] = "标+EX",
 
diff --git a/packages/standard_cards/init.lua b/packages/standard_cards/init.lua
index 222e548f..b3fb0963 100644
--- a/packages/standard_cards/init.lua
+++ b/packages/standard_cards/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local extension = Package:new("standard_cards", Package.CardPack)
 extension.metadata = require "packages.standard_cards.metadata"
 
diff --git a/packages/standard_cards/metadata.lua b/packages/standard_cards/metadata.lua
index b127e681..ba8a67bb 100644
--- a/packages/standard_cards/metadata.lua
+++ b/packages/standard_cards/metadata.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 return {
   name = "standard_cards",
   author = "official",
diff --git a/packages/test/init.lua b/packages/test/init.lua
index c49723be..c533ad2a 100644
--- a/packages/test/init.lua
+++ b/packages/test/init.lua
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
 local fkp_extensions = require "packages.test.test"
 local extension = fkp_extensions[1]
 
diff --git a/qml/Config.qml b/qml/Config.qml
index efa4fd09..a7eb4897 100644
--- a/qml/Config.qml
+++ b/qml/Config.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 QtObject {
diff --git a/qml/Logic.js b/qml/Logic.js
index 719b22a9..105887fe 100644
--- a/qml/Logic.js
+++ b/qml/Logic.js
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 var generalsOverviewPage, cardsOverviewPage;
 var clientPageCreated = false;
 function createClientPages() {
diff --git a/qml/Pages/About.qml b/qml/Pages/About.qml
index d320a830..22edbb8b 100644
--- a/qml/Pages/About.qml
+++ b/qml/Pages/About.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/CardsOverview.qml b/qml/Pages/CardsOverview.qml
index c3ba067e..8caee7f4 100644
--- a/qml/Pages/CardsOverview.qml
+++ b/qml/Pages/CardsOverview.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
diff --git a/qml/Pages/Common/ChatBox.qml b/qml/Pages/Common/ChatBox.qml
index bfc4654d..22380ce3 100644
--- a/qml/Pages/Common/ChatBox.qml
+++ b/qml/Pages/Common/ChatBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 
diff --git a/qml/Pages/Common/LogEdit.qml b/qml/Pages/Common/LogEdit.qml
index 00bc58fb..42cfabc8 100644
--- a/qml/Pages/Common/LogEdit.qml
+++ b/qml/Pages/Common/LogEdit.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 
diff --git a/qml/Pages/GeneralsOverview.qml b/qml/Pages/GeneralsOverview.qml
index 5ed95486..4d37b4e7 100644
--- a/qml/Pages/GeneralsOverview.qml
+++ b/qml/Pages/GeneralsOverview.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
diff --git a/qml/Pages/Init.qml b/qml/Pages/Init.qml
index dcaa669a..245b0063 100644
--- a/qml/Pages/Init.qml
+++ b/qml/Pages/Init.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
diff --git a/qml/Pages/Lobby.qml b/qml/Pages/Lobby.qml
index 9dbf3569..424c6cf4 100644
--- a/qml/Pages/Lobby.qml
+++ b/qml/Pages/Lobby.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Window
diff --git a/qml/Pages/LobbyElement/CreateRoom.qml b/qml/Pages/LobbyElement/CreateRoom.qml
index 04da9483..525ecbbd 100644
--- a/qml/Pages/LobbyElement/CreateRoom.qml
+++ b/qml/Pages/LobbyElement/CreateRoom.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/LobbyElement/EditProfile.qml b/qml/Pages/LobbyElement/EditProfile.qml
index be536218..616490a2 100644
--- a/qml/Pages/LobbyElement/EditProfile.qml
+++ b/qml/Pages/LobbyElement/EditProfile.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/LobbyElement/PersonalSettings.qml b/qml/Pages/LobbyElement/PersonalSettings.qml
index a47e694c..d6434fb9 100644
--- a/qml/Pages/LobbyElement/PersonalSettings.qml
+++ b/qml/Pages/LobbyElement/PersonalSettings.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import "../skin-bank.js" as SkinBank
diff --git a/qml/Pages/LobbyElement/RoomGeneralSettings.qml b/qml/Pages/LobbyElement/RoomGeneralSettings.qml
index 5276903e..2d3f367e 100644
--- a/qml/Pages/LobbyElement/RoomGeneralSettings.qml
+++ b/qml/Pages/LobbyElement/RoomGeneralSettings.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/LobbyElement/RoomPackageSettings.qml b/qml/Pages/LobbyElement/RoomPackageSettings.qml
index 9cce00fa..d12414f8 100644
--- a/qml/Pages/LobbyElement/RoomPackageSettings.qml
+++ b/qml/Pages/LobbyElement/RoomPackageSettings.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/Logic.js b/qml/Pages/Logic.js
index e1578741..15c0db6e 100644
--- a/qml/Pages/Logic.js
+++ b/qml/Pages/Logic.js
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 callbacks["UpdateAvatar"] = function(jsonData) {
   mainWindow.busy = false;
   Self.avatar = jsonData;
diff --git a/qml/Pages/MetroButton.qml b/qml/Pages/MetroButton.qml
index 3b84be05..a9ade3cb 100644
--- a/qml/Pages/MetroButton.qml
+++ b/qml/Pages/MetroButton.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/ModesOverview.qml b/qml/Pages/ModesOverview.qml
index c86cd4cc..677467e6 100644
--- a/qml/Pages/ModesOverview.qml
+++ b/qml/Pages/ModesOverview.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
diff --git a/qml/Pages/PackageManage.qml b/qml/Pages/PackageManage.qml
index d3d15171..6c15ab13 100644
--- a/qml/Pages/PackageManage.qml
+++ b/qml/Pages/PackageManage.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/Room.qml b/qml/Pages/Room.qml
index 6d288b89..f7010245 100644
--- a/qml/Pages/Room.qml
+++ b/qml/Pages/Room.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/RoomElement/AG.qml b/qml/Pages/RoomElement/AG.qml
index 84da8209..6466c0a9 100644
--- a/qml/Pages/RoomElement/AG.qml
+++ b/qml/Pages/RoomElement/AG.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 GraphicsBox {
diff --git a/qml/Pages/RoomElement/CardArea.qml b/qml/Pages/RoomElement/CardArea.qml
index b005db80..be65f40a 100644
--- a/qml/Pages/RoomElement/CardArea.qml
+++ b/qml/Pages/RoomElement/CardArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 // CardArea stores CardItem.
diff --git a/qml/Pages/RoomElement/CardItem.qml b/qml/Pages/RoomElement/CardItem.qml
index fdcce2e0..1e79f0f0 100644
--- a/qml/Pages/RoomElement/CardItem.qml
+++ b/qml/Pages/RoomElement/CardItem.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import Qt5Compat.GraphicalEffects
 import "../skin-bank.js" as SkinBank
diff --git a/qml/Pages/RoomElement/Cheat/FreeAssign.qml b/qml/Pages/RoomElement/Cheat/FreeAssign.qml
index b617e87f..01004a85 100644
--- a/qml/Pages/RoomElement/Cheat/FreeAssign.qml
+++ b/qml/Pages/RoomElement/Cheat/FreeAssign.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/RoomElement/Cheat/PlayerDetail.qml b/qml/Pages/RoomElement/Cheat/PlayerDetail.qml
index b557c9b3..a0116aad 100644
--- a/qml/Pages/RoomElement/Cheat/PlayerDetail.qml
+++ b/qml/Pages/RoomElement/Cheat/PlayerDetail.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/RoomElement/Cheat/SameConvert.qml b/qml/Pages/RoomElement/Cheat/SameConvert.qml
index e5b319ae..0053e8ab 100644
--- a/qml/Pages/RoomElement/Cheat/SameConvert.qml
+++ b/qml/Pages/RoomElement/Cheat/SameConvert.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
diff --git a/qml/Pages/RoomElement/ChoiceBox.qml b/qml/Pages/RoomElement/ChoiceBox.qml
index 5593ca3c..ffb05dfe 100644
--- a/qml/Pages/RoomElement/ChoiceBox.qml
+++ b/qml/Pages/RoomElement/ChoiceBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import ".."
diff --git a/qml/Pages/RoomElement/ChooseGeneralBox.qml b/qml/Pages/RoomElement/ChooseGeneralBox.qml
index 50ab8f78..34214ceb 100644
--- a/qml/Pages/RoomElement/ChooseGeneralBox.qml
+++ b/qml/Pages/RoomElement/ChooseGeneralBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 import "../skin-bank.js" as SkinBank
diff --git a/qml/Pages/RoomElement/Dashboard.qml b/qml/Pages/RoomElement/Dashboard.qml
index e29d488a..838af9ec 100644
--- a/qml/Pages/RoomElement/Dashboard.qml
+++ b/qml/Pages/RoomElement/Dashboard.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import Qt5Compat.GraphicalEffects
diff --git a/qml/Pages/RoomElement/GameOverBox.qml b/qml/Pages/RoomElement/GameOverBox.qml
index 191c10b6..a4ad42ce 100644
--- a/qml/Pages/RoomElement/GameOverBox.qml
+++ b/qml/Pages/RoomElement/GameOverBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 
diff --git a/qml/Pages/RoomElement/GeneralCardItem.qml b/qml/Pages/RoomElement/GeneralCardItem.qml
index 63a624b5..6c493c37 100644
--- a/qml/Pages/RoomElement/GeneralCardItem.qml
+++ b/qml/Pages/RoomElement/GeneralCardItem.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/GlowText.qml b/qml/Pages/RoomElement/GlowText.qml
index d5462246..16e4c3c8 100644
--- a/qml/Pages/RoomElement/GlowText.qml
+++ b/qml/Pages/RoomElement/GlowText.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import Qt5Compat.GraphicalEffects
 
diff --git a/qml/Pages/RoomElement/GraphicsBox.qml b/qml/Pages/RoomElement/GraphicsBox.qml
index a8817940..43a09a5b 100644
--- a/qml/Pages/RoomElement/GraphicsBox.qml
+++ b/qml/Pages/RoomElement/GraphicsBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/RoomElement/GuanxingBox.qml b/qml/Pages/RoomElement/GuanxingBox.qml
index f6e93919..d7629185 100644
--- a/qml/Pages/RoomElement/GuanxingBox.qml
+++ b/qml/Pages/RoomElement/GuanxingBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import ".."
diff --git a/qml/Pages/RoomElement/HandcardArea.qml b/qml/Pages/RoomElement/HandcardArea.qml
index 272e567c..7a85c8cd 100644
--- a/qml/Pages/RoomElement/HandcardArea.qml
+++ b/qml/Pages/RoomElement/HandcardArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../../util.js" as Utility
 
diff --git a/qml/Pages/RoomElement/IndicatorLine.qml b/qml/Pages/RoomElement/IndicatorLine.qml
index 025d04dd..00531b70 100644
--- a/qml/Pages/RoomElement/IndicatorLine.qml
+++ b/qml/Pages/RoomElement/IndicatorLine.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/RoomElement/InvisibleCardArea.qml b/qml/Pages/RoomElement/InvisibleCardArea.qml
index a0a26215..2a01aa28 100644
--- a/qml/Pages/RoomElement/InvisibleCardArea.qml
+++ b/qml/Pages/RoomElement/InvisibleCardArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/RoomElement/Photo.qml b/qml/Pages/RoomElement/Photo.qml
index e5bd62dd..782ca637 100644
--- a/qml/Pages/RoomElement/Photo.qml
+++ b/qml/Pages/RoomElement/Photo.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import Qt5Compat.GraphicalEffects
 import QtQuick.Controls
diff --git a/qml/Pages/RoomElement/PhotoElement/DelayedTrickArea.qml b/qml/Pages/RoomElement/PhotoElement/DelayedTrickArea.qml
index d10abfe4..7dbb504e 100644
--- a/qml/Pages/RoomElement/PhotoElement/DelayedTrickArea.qml
+++ b/qml/Pages/RoomElement/PhotoElement/DelayedTrickArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 import "../../skin-bank.js" as SkinBank
diff --git a/qml/Pages/RoomElement/PhotoElement/EquipArea.qml b/qml/Pages/RoomElement/PhotoElement/EquipArea.qml
index 5cf0a21c..0fc2c22b 100644
--- a/qml/Pages/RoomElement/PhotoElement/EquipArea.qml
+++ b/qml/Pages/RoomElement/PhotoElement/EquipArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 import "../../skin-bank.js" as SkinBank
diff --git a/qml/Pages/RoomElement/PhotoElement/EquipItem.qml b/qml/Pages/RoomElement/PhotoElement/EquipItem.qml
index 206ddab6..4a2dd06d 100644
--- a/qml/Pages/RoomElement/PhotoElement/EquipItem.qml
+++ b/qml/Pages/RoomElement/PhotoElement/EquipItem.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 import "../../../util.js" as Utility
diff --git a/qml/Pages/RoomElement/PhotoElement/HpBar.qml b/qml/Pages/RoomElement/PhotoElement/HpBar.qml
index 2408ce04..1a9ec896 100644
--- a/qml/Pages/RoomElement/PhotoElement/HpBar.qml
+++ b/qml/Pages/RoomElement/PhotoElement/HpBar.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import ".."
 
diff --git a/qml/Pages/RoomElement/PhotoElement/LimitSkillArea.qml b/qml/Pages/RoomElement/PhotoElement/LimitSkillArea.qml
index b776cd16..2113f95c 100644
--- a/qml/Pages/RoomElement/PhotoElement/LimitSkillArea.qml
+++ b/qml/Pages/RoomElement/PhotoElement/LimitSkillArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 
diff --git a/qml/Pages/RoomElement/PhotoElement/LimitSkillItem.qml b/qml/Pages/RoomElement/PhotoElement/LimitSkillItem.qml
index 12f5bb55..9f0b156c 100644
--- a/qml/Pages/RoomElement/PhotoElement/LimitSkillItem.qml
+++ b/qml/Pages/RoomElement/PhotoElement/LimitSkillItem.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/PhotoElement/Magatama.qml b/qml/Pages/RoomElement/PhotoElement/Magatama.qml
index be909f42..8f24d9e2 100644
--- a/qml/Pages/RoomElement/PhotoElement/Magatama.qml
+++ b/qml/Pages/RoomElement/PhotoElement/Magatama.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/PhotoElement/MarkArea.qml b/qml/Pages/RoomElement/PhotoElement/MarkArea.qml
index a6786bbd..f0ee9135 100644
--- a/qml/Pages/RoomElement/PhotoElement/MarkArea.qml
+++ b/qml/Pages/RoomElement/PhotoElement/MarkArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 
diff --git a/qml/Pages/RoomElement/PhotoElement/RoleComboBox.qml b/qml/Pages/RoomElement/PhotoElement/RoleComboBox.qml
index 924710bf..8a911162 100644
--- a/qml/Pages/RoomElement/PhotoElement/RoleComboBox.qml
+++ b/qml/Pages/RoomElement/PhotoElement/RoleComboBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/PhotoElement/SpecialMarkArea.qml b/qml/Pages/RoomElement/PhotoElement/SpecialMarkArea.qml
index 202c2394..77dce19b 100644
--- a/qml/Pages/RoomElement/PhotoElement/SpecialMarkArea.qml
+++ b/qml/Pages/RoomElement/PhotoElement/SpecialMarkArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/RoomElement/PixmapAnimation.qml b/qml/Pages/RoomElement/PixmapAnimation.qml
index e1da7c8a..22fd2746 100644
--- a/qml/Pages/RoomElement/PixmapAnimation.qml
+++ b/qml/Pages/RoomElement/PixmapAnimation.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/PlayerCardBox.qml b/qml/Pages/RoomElement/PlayerCardBox.qml
index 13e0583a..46386ceb 100644
--- a/qml/Pages/RoomElement/PlayerCardBox.qml
+++ b/qml/Pages/RoomElement/PlayerCardBox.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import ".."
diff --git a/qml/Pages/RoomElement/SkillArea.qml b/qml/Pages/RoomElement/SkillArea.qml
index dd66f396..9251c119 100644
--- a/qml/Pages/RoomElement/SkillArea.qml
+++ b/qml/Pages/RoomElement/SkillArea.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 
diff --git a/qml/Pages/RoomElement/SkillButton.qml b/qml/Pages/RoomElement/SkillButton.qml
index eb5d3ec6..5a1b48f9 100644
--- a/qml/Pages/RoomElement/SkillButton.qml
+++ b/qml/Pages/RoomElement/SkillButton.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import Qt5Compat.GraphicalEffects
 
diff --git a/qml/Pages/RoomElement/SkillInteraction/SkillCombo.qml b/qml/Pages/RoomElement/SkillInteraction/SkillCombo.qml
index 4ab12eec..84df328c 100644
--- a/qml/Pages/RoomElement/SkillInteraction/SkillCombo.qml
+++ b/qml/Pages/RoomElement/SkillInteraction/SkillCombo.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../.."
 
diff --git a/qml/Pages/RoomElement/SkillInvokeAnimation.qml b/qml/Pages/RoomElement/SkillInvokeAnimation.qml
index d9ffd1c6..f989e206 100644
--- a/qml/Pages/RoomElement/SkillInvokeAnimation.qml
+++ b/qml/Pages/RoomElement/SkillInvokeAnimation.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import "../skin-bank.js" as SkinBank
 
diff --git a/qml/Pages/RoomElement/TablePile.qml b/qml/Pages/RoomElement/TablePile.qml
index 94af1f52..c67b8e06 100644
--- a/qml/Pages/RoomElement/TablePile.qml
+++ b/qml/Pages/RoomElement/TablePile.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Item {
diff --git a/qml/Pages/RoomElement/ViewPile.qml b/qml/Pages/RoomElement/ViewPile.qml
index b93c14aa..8263c968 100644
--- a/qml/Pages/RoomElement/ViewPile.qml
+++ b/qml/Pages/RoomElement/ViewPile.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
diff --git a/qml/Pages/RoomLogic.js b/qml/Pages/RoomLogic.js
index 44a05862..706719e5 100644
--- a/qml/Pages/RoomLogic.js
+++ b/qml/Pages/RoomLogic.js
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 var Card = {
   Unknown : 0,
   PlayerHand : 1,
diff --git a/qml/Pages/TileButton.qml b/qml/Pages/TileButton.qml
index b38fe053..a6731789 100644
--- a/qml/Pages/TileButton.qml
+++ b/qml/Pages/TileButton.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import Qt5Compat.GraphicalEffects
 import "skin-bank.js" as SkinBank
diff --git a/qml/Pages/WebInit.qml b/qml/Pages/WebInit.qml
index ee3188b3..c3ba4f34 100644
--- a/qml/Pages/WebInit.qml
+++ b/qml/Pages/WebInit.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 
diff --git a/qml/Pages/skin-bank.js b/qml/Pages/skin-bank.js
index 58d2cf11..2ec1181e 100644
--- a/qml/Pages/skin-bank.js
+++ b/qml/Pages/skin-bank.js
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 //var AppPath = "file:///home/notify/develop/FreeKill";
 var PHOTO_BACK_DIR = AppPath + "/image/photo/back/";
 var PHOTO_DIR = AppPath + "/image/photo/";
diff --git a/qml/Splash.qml b/qml/Splash.qml
index 583db4e5..9e71bf03 100644
--- a/qml/Splash.qml
+++ b/qml/Splash.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Layouts
 
diff --git a/qml/Toast.qml b/qml/Toast.qml
index a2266b23..e65ddb09 100644
--- a/qml/Toast.qml
+++ b/qml/Toast.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 Rectangle {
diff --git a/qml/ToastManager.qml b/qml/ToastManager.qml
index f7f4c0a4..7c59cd0f 100644
--- a/qml/ToastManager.qml
+++ b/qml/ToastManager.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 
 // copy from https://gist.github.com/jonmcclung/bae669101d17b103e94790341301c129
diff --git a/qml/main.qml b/qml/main.qml
index 136c83f6..102178e3 100644
--- a/qml/main.qml
+++ b/qml/main.qml
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Window
diff --git a/qml/util.js b/qml/util.js
index 5f18888c..785d29d0 100644
--- a/qml/util.js
+++ b/qml/util.js
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 .pragma library
 
 function convertNumber(number) {
diff --git a/server/init.sql b/server/init.sql
index 14333fd6..500d659f 100644
--- a/server/init.sql
+++ b/server/init.sql
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+
 CREATE TABLE userinfo (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
   name VARCHAR(255),
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5b3af504..cd972788 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 set(freekill_SRCS
   "main.cpp"
   "core/player.cpp"
diff --git a/src/client/client.cpp b/src/client/client.cpp
index 4213f8f3..adb17fe6 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "client.h"
 #include "client_socket.h"
 #include "clientplayer.h"
diff --git a/src/client/client.h b/src/client/client.h
index fb160a71..c8504252 100644
--- a/src/client/client.h
+++ b/src/client/client.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _CLIENT_H
 #define _CLIENT_H
 
diff --git a/src/client/clientplayer.cpp b/src/client/clientplayer.cpp
index f0142a33..cfce7ee3 100644
--- a/src/client/clientplayer.cpp
+++ b/src/client/clientplayer.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "clientplayer.h"
 
 ClientPlayer::ClientPlayer(int id, QObject* parent)
diff --git a/src/client/clientplayer.h b/src/client/clientplayer.h
index a4b13306..31d5bea1 100644
--- a/src/client/clientplayer.h
+++ b/src/client/clientplayer.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _CLIENTPLAYER_H
 #define _CLIENTPLAYER_H
 
diff --git a/src/core/packman.cpp b/src/core/packman.cpp
index 3d459e59..c82d603a 100644
--- a/src/core/packman.cpp
+++ b/src/core/packman.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "packman.h"
 #include "util.h"
 #include "git2.h"
diff --git a/src/core/packman.h b/src/core/packman.h
index b85f8573..f45a8e26 100644
--- a/src/core/packman.h
+++ b/src/core/packman.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _PACKMAN_H
 #define _PACKMAN_H
 
diff --git a/src/core/parser.cpp b/src/core/parser.cpp
index fe6a4d9d..d7eb3314 100644
--- a/src/core/parser.cpp
+++ b/src/core/parser.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "parser.h"
 
 static Parser *p = nullptr;
diff --git a/src/core/parser.h b/src/core/parser.h
index cab4c87d..8b689472 100644
--- a/src/core/parser.h
+++ b/src/core/parser.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _PARSER_H
 #define _PARSER_H
 
diff --git a/src/core/player.cpp b/src/core/player.cpp
index a9998427..4c0d78a8 100644
--- a/src/core/player.cpp
+++ b/src/core/player.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "player.h"
 
 Player::Player(QObject* parent)
diff --git a/src/core/player.h b/src/core/player.h
index 6ccb39b6..06358f1f 100644
--- a/src/core/player.h
+++ b/src/core/player.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _PLAYER_H
 #define _PLAYER_H
 
diff --git a/src/core/util.cpp b/src/core/util.cpp
index ad806b72..3a04255c 100644
--- a/src/core/util.cpp
+++ b/src/core/util.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "util.h"
 #include <qcryptographichash.h>
 #include <qnamespace.h>
diff --git a/src/core/util.h b/src/core/util.h
index 1bc901cd..537406fa 100644
--- a/src/core/util.h
+++ b/src/core/util.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _GLOBAL_H
 #define _GLOBAL_H
 
diff --git a/src/main.cpp b/src/main.cpp
index f90f755e..fba9ebd0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "client.h"
 #ifndef Q_OS_WASM
 #include "server.h"
diff --git a/src/network/client_socket.cpp b/src/network/client_socket.cpp
index 6008f835..c133f214 100644
--- a/src/network/client_socket.cpp
+++ b/src/network/client_socket.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "client_socket.h"
 
 ClientSocket::ClientSocket() : socket(new QTcpSocket(this))
diff --git a/src/network/client_socket.h b/src/network/client_socket.h
index 32034acb..d8e3ae50 100644
--- a/src/network/client_socket.h
+++ b/src/network/client_socket.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _CLIENT_SOCKET_H
 #define _CLIENT_SOCKET_H
 
diff --git a/src/network/router.cpp b/src/network/router.cpp
index ad5d5e7c..5ebf0fd2 100644
--- a/src/network/router.cpp
+++ b/src/network/router.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "router.h"
 #include "client.h"
 #include "client_socket.h"
diff --git a/src/network/router.h b/src/network/router.h
index 04cfb506..7df10c44 100644
--- a/src/network/router.h
+++ b/src/network/router.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _ROUTER_H
 #define _ROUTER_H
 
diff --git a/src/network/server_socket.cpp b/src/network/server_socket.cpp
index cd346a3b..15c50324 100644
--- a/src/network/server_socket.cpp
+++ b/src/network/server_socket.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "server_socket.h"
 #include "client_socket.h"
 
diff --git a/src/network/server_socket.h b/src/network/server_socket.h
index a3a8e8c9..310b6913 100644
--- a/src/network/server_socket.h
+++ b/src/network/server_socket.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _SERVER_SOCKET_H
 #define _SERVER_SOCKET_H
 
diff --git a/src/pch.h b/src/pch.h
index 311392ab..f73e304b 100644
--- a/src/pch.h
+++ b/src/pch.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _PCH_H
 #define _PCH_H
 
diff --git a/src/server/room.cpp b/src/server/room.cpp
index 8a3d353f..3133b5c4 100644
--- a/src/server/room.cpp
+++ b/src/server/room.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "room.h"
 #include "serverplayer.h"
 #include "server.h"
diff --git a/src/server/room.h b/src/server/room.h
index 39e7627e..8402d154 100644
--- a/src/server/room.h
+++ b/src/server/room.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _ROOM_H
 #define _ROOM_H
 
diff --git a/src/server/server.cpp b/src/server/server.cpp
index 47058fd9..bbed6d3c 100644
--- a/src/server/server.cpp
+++ b/src/server/server.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "server.h"
 #include "player.h"
 #include "server_socket.h"
diff --git a/src/server/server.h b/src/server/server.h
index a61ab05f..04a46d77 100644
--- a/src/server/server.h
+++ b/src/server/server.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _SERVER_H
 #define _SERVER_H
 
diff --git a/src/server/serverplayer.cpp b/src/server/serverplayer.cpp
index b47d8117..f77baa71 100644
--- a/src/server/serverplayer.cpp
+++ b/src/server/serverplayer.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "serverplayer.h"
 #include "room.h"
 #include "server.h"
diff --git a/src/server/serverplayer.h b/src/server/serverplayer.h
index 89df7327..1ee79c65 100644
--- a/src/server/serverplayer.h
+++ b/src/server/serverplayer.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _SERVERPLAYER_H
 #define _SERVERPLAYER_H
 
diff --git a/src/server/shell.cpp b/src/server/shell.cpp
index b8944a97..206a68ec 100644
--- a/src/server/shell.cpp
+++ b/src/server/shell.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #if defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID)
 #include "shell.h"
 #include "server.h"
diff --git a/src/server/shell.h b/src/server/shell.h
index e283702c..4c40e240 100644
--- a/src/server/shell.h
+++ b/src/server/shell.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _SHELL_H
 #define _SHELL_H
 
diff --git a/src/swig/client.i b/src/swig/client.i
index 953e73b0..e22fb48a 100644
--- a/src/swig/client.i
+++ b/src/swig/client.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %nodefaultctor QmlBackend;
 %nodefaultdtor QmlBackend;
 class QmlBackend : public QObject {
diff --git a/src/swig/freekill-nogui.i b/src/swig/freekill-nogui.i
index d5de3d19..b0e5b001 100644
--- a/src/swig/freekill-nogui.i
+++ b/src/swig/freekill-nogui.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %module fk
 
 %{
diff --git a/src/swig/freekill-wasm.i b/src/swig/freekill-wasm.i
index 6f7832ee..0f15fb65 100644
--- a/src/swig/freekill-wasm.i
+++ b/src/swig/freekill-wasm.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %module fk
 
 %{
diff --git a/src/swig/freekill.i b/src/swig/freekill.i
index 80ff9c92..e8c4dd12 100644
--- a/src/swig/freekill.i
+++ b/src/swig/freekill.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %module fk
 
 %{
diff --git a/src/swig/naturalvar.i b/src/swig/naturalvar.i
index a55ec40a..5d943696 100644
--- a/src/swig/naturalvar.i
+++ b/src/swig/naturalvar.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // ------------------------------------------------------
 // type bindings
 // ------------------------------------------------------
diff --git a/src/swig/player.i b/src/swig/player.i
index ecd684bc..8dae1942 100644
--- a/src/swig/player.i
+++ b/src/swig/player.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %nodefaultctor Player;
 %nodefaultdtor Player;
 class Player : public QObject {
diff --git a/src/swig/qt.i b/src/swig/qt.i
index 7edd2726..620395eb 100644
--- a/src/swig/qt.i
+++ b/src/swig/qt.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // Make the base classes look like "complete"
 class QObject {};
 class QThread {
diff --git a/src/swig/server.i b/src/swig/server.i
index 01472d12..8d8a985d 100644
--- a/src/swig/server.i
+++ b/src/swig/server.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 %nodefaultctor Server;
 %nodefaultdtor Server;
 class Server : public QObject {
diff --git a/src/swig/sqlite3.i b/src/swig/sqlite3.i
index c5c0610b..435a18fb 100644
--- a/src/swig/sqlite3.i
+++ b/src/swig/sqlite3.i
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 struct sqlite3;
 
 sqlite3 *OpenDatabase(const QString &filename);
diff --git a/src/ui/qmlbackend.cpp b/src/ui/qmlbackend.cpp
index 173e0048..e6ee9058 100644
--- a/src/ui/qmlbackend.cpp
+++ b/src/ui/qmlbackend.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "qmlbackend.h"
 #include <qaudiooutput.h>
 #include <qmediaplayer.h>
diff --git a/src/ui/qmlbackend.h b/src/ui/qmlbackend.h
index cfd9b6ef..62f526ba 100644
--- a/src/ui/qmlbackend.h
+++ b/src/ui/qmlbackend.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #ifndef _QMLBACKEND_H
 #define _QMLBACKEND_H