diff --git a/firebase-messaging.html b/firebase-messaging.html
index fa2bf28..80a13c8 100644
--- a/firebase-messaging.html
+++ b/firebase-messaging.html
@@ -29,7 +29,7 @@
 ```js
 this.$.messaging.requestPermission().then(function() {
   // permission was granted
-}, function(err) {
+}).catch(function(err) {
   // permission was denied
 });
 ```