--- a/modbus/__init__.py	Wed May 23 20:22:45 2018 +0200
+++ b/modbus/__init__.py	Mon Jun 11 08:34:15 2018 +0200
@@ -8,7 +8,7 @@
 #
 # 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 3 of the License, or
+# the Free Software Foundation, either version 2 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,