diff --git a/oauth-callback-twitter.html b/oauth-callback-twitter.html
index f9ac9bc..b66b320 100644
--- a/oauth-callback-twitter.html
+++ b/oauth-callback-twitter.html
@@ -2,6 +2,21 @@
 <html>
 <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <!--
+     | Copyright 2015 Esri
+     |
+     | Licensed under the Apache License, Version 2.0 (the "License");
+     | you may not use this file except in compliance with the License.
+     | You may obtain a copy of the License at
+     |
+     |    http://www.apache.org/licenses/LICENSE-2.0
+     |
+     | Unless required by applicable law or agreed to in writing, software
+     | distributed under the License is distributed on an "AS IS" BASIS,
+     | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     | See the License for the specific language governing permissions and
+     | limitations under the License.
+    -->
     <title>OAuth Popup Callback</title>
     <style type="text/css">
         html,
