diff --git a/src/main/java/de/zonlykroks/advancedscripts/mixin/KeyboardMixin.java b/src/main/java/de/zonlykroks/advancedscripts/mixin/KeyboardMixin.java
index e5dad7b..36156b6 100644
--- a/src/main/java/de/zonlykroks/advancedscripts/mixin/KeyboardMixin.java
+++ b/src/main/java/de/zonlykroks/advancedscripts/mixin/KeyboardMixin.java
@@ -1,3 +1,19 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2020  SteamWar.de-Serverteam
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package de.zonlykroks.advancedscripts.mixin;
 
 import io.netty.buffer.Unpooled;