diff --git a/util/file.go b/util/file.go
index 394983c..66b7240 100644
--- a/util/file.go
+++ b/util/file.go
@@ -1,3 +1,11 @@
+// This file is Free Software under the MIT License
+// without warranty, see README.md and LICENSES/MIT.txt for details.
+//
+// SPDX-License-Identifier: MIT
+//
+// SPDX-FileCopyrightText: 2021 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
+// Software-Engineering: 2021 Intevation GmbH <https://intevation.de>
+
 package util
 
 import (