diff --git a/source.go b/source.go
index 03db6aa..0688721 100644
--- a/source.go
+++ b/source.go
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Winni Neessen <wn@neessen.dev>
+//
+// SPDX-License-Identifier: MIT
+
 package meteologix
 
 import "strings"