diff --git a/src/config.go b/src/config.go
index c9086f9..f0f2623 100644
--- a/src/config.go
+++ b/src/config.go
@@ -1,3 +1,5 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
 package main
 
 import (
diff --git a/src/config_test.go b/src/config_test.go
index 61129ff..ee6849a 100644
--- a/src/config_test.go
+++ b/src/config_test.go
@@ -1,3 +1,5 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
 package main
 
 import (
diff --git a/src/ssh.go b/src/ssh.go
index 2f56b31..d8839f5 100644
--- a/src/ssh.go
+++ b/src/ssh.go
@@ -1,3 +1,5 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
 package main
 
 import (
diff --git a/src/ssh_test.go b/src/ssh_test.go
index f99faa0..01a5c4b 100644
--- a/src/ssh_test.go
+++ b/src/ssh_test.go
@@ -1,3 +1,5 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
 package main
 
 import (