diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Action.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Action.java
index 8b3dd25..a054d82 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Action.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Action.java
@@ -5,7 +5,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogItem.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogItem.java
index 93184df..bf05a1e 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogItem.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogItem.java
@@ -5,7 +5,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogType.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogType.java
index 0e7ae49..be0f66d 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogType.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/LogType.java
@@ -5,7 +5,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/PrintStyle.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/PrintStyle.java
index fb242b3..0166f55 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/PrintStyle.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/PrintStyle.java
@@ -5,7 +5,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/QQWing.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/QQWing.java
index ee5dfb8..dfee30e 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/QQWing.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/QQWing.java
@@ -7,7 +7,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,
diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Symmetry.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Symmetry.java
index d78fc3f..04d0992 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Symmetry.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/controller/qqwing/Symmetry.java
@@ -5,7 +5,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * 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,