diff --git a/protos/voltha_protos/openolt.proto b/protos/voltha_protos/openolt.proto
index 755c706..3fcd2af 100755
--- a/protos/voltha_protos/openolt.proto
+++ b/protos/voltha_protos/openolt.proto
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 Open Networking Foundation
+// Copyright 2018-2024 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.