diff --git a/radicale/rights/from_file.py b/radicale/rights/from_file.py
index aaec8307..6d63c801 100644
--- a/radicale/rights/from_file.py
+++ b/radicale/rights/from_file.py
@@ -1,6 +1,7 @@
 # This file is part of Radicale - CalDAV and CardDAV server
 # Copyright © 2012-2017 Guillaume Ayoub
-# Copyright © 2017-2019 Unrud <unrud@outlook.com>
+# Copyright © 2017-2021 Unrud <unrud@outlook.com>
+# Copyright © 2024-2024 Peter Bieringer <pb@bieringer.de>
 #
 # This library is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by