diff --git a/google/internal/externalaccount/impersonate.go b/google/internal/externalaccount/impersonate.go
index 323fbca..f794a3a 100644
--- a/google/internal/externalaccount/impersonate.go
+++ b/google/internal/externalaccount/impersonate.go
@@ -1,4 +1,4 @@
-// Copyright 2020 The Go Authors. All rights reserved.
+// Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/google/internal/externalaccount/impersonate_test.go b/google/internal/externalaccount/impersonate_test.go
index 0c8d600..5526a42 100644
--- a/google/internal/externalaccount/impersonate_test.go
+++ b/google/internal/externalaccount/impersonate_test.go
@@ -1,4 +1,4 @@
-// Copyright 2020 The Go Authors. All rights reserved.
+// Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.