diff --git a/check_domain_expiration_rdap.py b/check_domain_expiration_rdap.py
index b795152..352b38c 100755
--- a/check_domain_expiration_rdap.py
+++ b/check_domain_expiration_rdap.py
@@ -1,5 +1,8 @@
 #!/usr/bin/env python
 
+# Copyright 2024 Alarig Le Lay <alarig@swordarmor.fr>
+# Distributed under the terms of the GNU General Public License v3
+
 import argparse
 import datetime
 import logging