diff --git a/version.txt b/version.txt
index afaf360..b9dd3ca 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1,6 @@
+<!--
+SPDX-FileCopyrightText: 2023 Alliander N.V.
+
+SPDX-License-Identifier: Apache-2.0
+-->
 1.0.0
\ No newline at end of file