diff --git a/src/polyfills.js b/src/polyfills.js
index d3695134..a4ef6ea0 100644
--- a/src/polyfills.js
+++ b/src/polyfills.js
@@ -3,3 +3,8 @@
 if(!window.Promise) {
   require("core-js/fn/promise")
 }
+
+// Required by IE 11
+if(!String.prototype.startsWith) {
+  require("core-js/es6/string")
+}