diff --git a/index.html b/index.html
index cfced8a..77bbce5 100644
--- a/index.html
+++ b/index.html
@@ -12,6 +12,7 @@
 	<link rel="manifest" href="manifest.json">
 	<script async src="sw.js"></script>
 	<script defer src="https://cdnjs.cloudflare.com/ajax/libs/slideout/1.0.1/slideout.js"></script>
+	<script defer src="https://cdn.polyfill.io/v3/polyfill.js?features=es6"></script>
 	<script defer src="js/index.js"></script>
 	<style>
 		#splashScreen {