diff --git a/.github/workflows/zenodo-sandbox.yml b/.github/workflows/zenodo-sandbox.yml
index a221fc3..5f0ca48 100644
--- a/.github/workflows/zenodo-sandbox.yml
+++ b/.github/workflows/zenodo-sandbox.yml
@@ -1,3 +1,10 @@
+# SPDX-FileCopyrightText: 2024 German Aerospace Center (DLR)
+#
+# SPDX-License-Identifier: CC0-1.0
+
+# SPDX-FileContributor: Michael Meinel
+# SPDX-FileContributor: Michael Fritzsche
+
 name: Software publication on Zenodo Sandbox
 
 on: