diff --git a/sop-java/src/main/resources/sop-java-version.properties b/sop-java/src/main/resources/sop-java-version.properties
index 5f6f682..a2f509b 100644
--- a/sop-java/src/main/resources/sop-java-version.properties
+++ b/sop-java/src/main/resources/sop-java-version.properties
@@ -1 +1,4 @@
+# SPDX-FileCopyrightText: 2025 Paul Schaub <info@pgpainless.org>
+#
+# SPDX-License-Identifier: Apache-2.0
 sop-java-version=@project.version@
\ No newline at end of file