diff --git a/messaging/firebase-messaging-sw.js b/messaging/firebase-messaging-sw.js
index 69b01195e..53ce45aaa 100644
--- a/messaging/firebase-messaging-sw.js
+++ b/messaging/firebase-messaging-sw.js
@@ -2,8 +2,8 @@
 // Give the service worker access to Firebase Messaging.
 // Note that you can only use Firebase Messaging here, other Firebase libraries
 // are not available in the service worker.
-importScripts('https://www.gstatic.com/firebasejs/3.5.0/firebase-app.js');
-importScripts('https://www.gstatic.com/firebasejs/3.5.0/firebase-messaging.js');
+importScripts('https://www.gstatic.com/firebasejs/3.5.2/firebase-app.js');
+importScripts('https://www.gstatic.com/firebasejs/3.5.2/firebase-messaging.js');
 
 // Initialize the Firebase app in the service worker by passing in the
 // messagingSenderId.