diff --git a/act/cacheproxy/handler.go b/act/cacheproxy/handler.go
index 49ef88ba..da0b838c 100644
--- a/act/cacheproxy/handler.go
+++ b/act/cacheproxy/handler.go
@@ -1,3 +1,6 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
 package cacheproxy
 
 import (