diff --git a/mailbox/CMakeLists.txt b/mailbox/CMakeLists.txt
index 1728b4e..44d8c82 100644
--- a/mailbox/CMakeLists.txt
+++ b/mailbox/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# (C) COPYRIGHT 2020 ARM Limited. All rights reserved.
+# Copyright (c) 2020-2022 Arm Limited.
 #
 # This program is free software and is provided to you under the terms of the
 # GNU General Public License version 2 as published by the Free Software