diff --git a/service/history/historyEngine.go b/service/history/historyEngine.go
index 703f0126048..9ff63f4d898 100644
--- a/service/history/historyEngine.go
+++ b/service/history/historyEngine.go
@@ -1,4 +1,5 @@
-// Copyright (c) 2017 Uber Technologies, Inc.
+// Copyright (c) 2017-2021 Uber Technologies, Inc.
+// Portions of the Software are attributed to Copyright (c) 2021 Temporal Technologies Inc.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal