diff --git a/stwfsapy/tests/expansion/common.py b/stwfsapy/tests/expansion/common.py
index ef222db..54b84a0 100644
--- a/stwfsapy/tests/expansion/common.py
+++ b/stwfsapy/tests/expansion/common.py
@@ -1,4 +1,4 @@
-# Copyright 2020-2023 Leibniz Information Centre for Economics
+# Copyright 2020-2024 Leibniz Information Centre for Economics
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.