diff --git a/config/config.ua.yaml b/config/config.ua.yaml
index dcb1d86e..c30cde9e 100644
--- a/config/config.ua.yaml
+++ b/config/config.ua.yaml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2017-2023 The PyPSA-Eur Authors
+#
+# SPDX-License-Identifier: CC0-1.0
+
 scenario:
   simpl:
   - ''