diff --git a/api/bbsim/bbsim.proto b/api/bbsim/bbsim.proto
index 3a32175..336a681 100644
--- a/api/bbsim/bbsim.proto
+++ b/api/bbsim/bbsim.proto
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 Open Networking Foundation
+// Copyright 2018-2023 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.
diff --git a/api/bbsim/bbsim_dmi.proto b/api/bbsim/bbsim_dmi.proto
index 48c7da9..db4d274 100644
--- a/api/bbsim/bbsim_dmi.proto
+++ b/api/bbsim/bbsim_dmi.proto
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 Open Networking Foundation
+// Copyright 2018-2023 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.
diff --git a/api/legacy/bbsim.proto b/api/legacy/bbsim.proto
index 6c339b1..73963a1 100644
--- a/api/legacy/bbsim.proto
+++ b/api/legacy/bbsim.proto
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 Open Networking Foundation
+// Copyright 2018-2023 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.