diff --git a/tools/check/forbidden_strings_in_xml.txt b/tools/check/forbidden_strings_in_xml.txt
index ee0e4c7136..b30408c533 100755
--- a/tools/check/forbidden_strings_in_xml.txt
+++ b/tools/check/forbidden_strings_in_xml.txt
@@ -1,18 +1,7 @@
+# Copyright 2023-2024 New Vector Ltd.
 #
-# Copyright 2023 New Vector Ltd
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
+# SPDX-License-Identifier: AGPL-3.0-only
+# Please see LICENSE in the repository root for full details.
 
 # This file list String which are not allowed in resource.
 # Use Perl regex to write forbidden strings