diff --git a/cloud/apigw/server/server.go b/cloud/apigw/server/server.go
index 902b4e0..d075e98 100644
--- a/cloud/apigw/server/server.go
+++ b/cloud/apigw/server/server.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package server
 
 import (