diff --git a/pgpainless-sop/src/main/resources/pgpainless-sop.properties b/pgpainless-sop/src/main/resources/pgpainless-sop.properties
index d71e996b..d0f47796 100644
--- a/pgpainless-sop/src/main/resources/pgpainless-sop.properties
+++ b/pgpainless-sop/src/main/resources/pgpainless-sop.properties
@@ -1 +1,4 @@
+# SPDX-FileCopyrightText: 2025 Paul Schaub <info@pgpainless.org>
+#
+# SPDX-License-Identifier: Apache-2.0
 pgpainless-sop-version=@project.version@
\ No newline at end of file