diff --git a/example/display_headers.dart b/example/display_headers.dart
index 9cefdab..42dbf22 100644
--- a/example/display_headers.dart
+++ b/example/display_headers.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';