diff --git a/issue-1_test.go b/issue-1_test.go
index 311fb3c51a1db932149e1d12da941e6fe75940ad..add7f9053943be09dbc455303fb66a6c67962f04 100644
--- a/issue-1_test.go
+++ b/issue-1_test.go
@@ -1,3 +1,6 @@
+// Copyright 2022 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package configuration
 
 import (
diff --git a/path-value.go b/path-value.go
index 56856fa0fd24efd759a2ecdd38fea031c4b0c445..b80e8c53a141a39d0daf4de62800ad9aa236fd62 100644
--- a/path-value.go
+++ b/path-value.go
@@ -1,3 +1,6 @@
+// Copyright 2022 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package configuration
 
 import "path"
diff --git a/path-value_test.go b/path-value_test.go
index 87a67c761a954c915e9931548a0fb7e521431f03..1ed4d440bad105a14f8b6efdda604bd0738aa1c5 100644
--- a/path-value_test.go
+++ b/path-value_test.go
@@ -1,3 +1,6 @@
+// Copyright 2022 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package configuration
 
 import (