diff --git a/www/app/index.html b/www/app/index.html
index a29bfd5..f1622b0 100644
--- a/www/app/index.html
+++ b/www/app/index.html
@@ -7,7 +7,7 @@
     <title>ETC Mining Pool</title>
     <meta name="description" content="High profitability ETC mining pool"/>
     <meta name="keywords" content="Ethereum, ethereum, Classic, classic, ETC, etc, pool, mining, cryptocurrency"/>
-    <script src="https://cdn.polyfill.io/v1/polyfill.min.js?features=Intl.~locale.en"></script>
+    <script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=Intl.~locale.en"></script>
     {{content-for "head"}}
     <link rel="stylesheet" href="{{rootURL}}assets/vendor.css">
     <link rel="stylesheet" href="{{rootURL}}assets/open-etc-pool.css">