diff --git a/CITATION.cff b/CITATION.cff
index c5e00d366..363e1b408 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2025 OPAL-RT Germany GmbH
+# SPDX-License-Identifier: Apache-2.0
 cff-version: "1.2.0"
 authors:
 - family-names: Vogel