diff --git a/internal/pkg/core/openolt_groupmgr.go b/internal/pkg/core/openolt_groupmgr.go
index 91f32e3..6490ebf 100644
--- a/internal/pkg/core/openolt_groupmgr.go
+++ b/internal/pkg/core/openolt_groupmgr.go
@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-present Open Networking Foundation
+ * Copyright 2020-2023 Open Networking Foundation (ONF) and the ONF Contributors
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at