diff --git a/src/client/index.tsx b/src/client/index.tsx
index 7539e29..2915ba4 100644
--- a/src/client/index.tsx
+++ b/src/client/index.tsx
@@ -1,5 +1,4 @@
 import '@babel/polyfill'
-import 'core-js'
 import App from './containers/App'
 import React from 'react'
 import ReactDOM from 'react-dom'