diff --git a/doorlockd-new/doorlockd.py b/doorlockd-new/doorlockd.py
index b7a00b7..b3aad1a 100755
--- a/doorlockd-new/doorlockd.py
+++ b/doorlockd-new/doorlockd.py
@@ -1,5 +1,22 @@
 #!/usr/bin/env python3
 
+"""
+Doorlockd -- Binary Kitchen's smart door opener
+
+Copyright (c) Binary Kitchen e.V., 2018
+
+Author:
+  Ralf Ramsauer <ralf@binary-kitchen.de>
+
+This work is licensed under the terms of the GNU GPL, version 2.  See
+the LICENSE file in the top-level directory.
+
+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 General Public License for more
+details.
+"""
+
 import logging
 import sys