diff --git a/error-handler_test.go b/error-handler_test.go
index 96279ff9983f1a18b9dedc8af21769f55201e236..88bb7980cf6b3d83fefcb07baaa95e64dc66df1e 100644
--- a/error-handler_test.go
+++ b/error-handler_test.go
@@ -1,3 +1,6 @@
+// Copyright 2022 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package configuration
 
 import (
diff --git a/handler.go b/handler.go
index 20a59e25c443da79f89d0e08e728f9ad01ef5eca..b5d5a1f813d8ea10b64ea6fba5b8037843cc3cb0 100644
--- a/handler.go
+++ b/handler.go
@@ -1,3 +1,6 @@
+// Copyright 2022 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package configuration
 
 type ChangeEventHandler struct {