diff --git a/metadata.html b/metadata.html
index a532812..7544639 100644
--- a/metadata.html
+++ b/metadata.html
@@ -1,3 +1,12 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
 <x-meta id="paper-button" label="Button" group="Paper" isContainer>
   <template>
     <paper-button label="Paper Button"></paper-button>
diff --git a/paper-button.css b/paper-button.css
index e8954ac..9030b7a 100644
--- a/paper-button.css
+++ b/paper-button.css
@@ -1,3 +1,13 @@
+/*
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
 :host {
   display: inline-block;
   position: relative;