diff --git a/engine/engine.go b/engine/engine.go
index 7900c9578eb7b0b4516d447c22f395b733cb0e04..f6e984e7ded13e1b8b6a80643db1785660ca7535 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -1,3 +1,6 @@
+// Copyright 2023 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package engine
 
 import (
diff --git a/engine/engine_test.go b/engine/engine_test.go
index 98b611c34272705d9ca560e16927efb9ee543549..7c980d3b117e4b9b389869ae4620122afab84e82 100644
--- a/engine/engine_test.go
+++ b/engine/engine_test.go
@@ -1,3 +1,6 @@
+// Copyright 2023 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package engine
 
 import (
diff --git a/engine/error.go b/engine/error.go
index be8f65415017c0c83d339188d743f5dae8c06a40..0e65bab34f5494d3e023bbc3913da787f7aa28d8 100644
--- a/engine/error.go
+++ b/engine/error.go
@@ -1,3 +1,6 @@
+// Copyright 2023 schukai GmbH
+// SPDX-License-Identifier: AGPL-3.0
+
 package engine
 
 import (