diff --git a/monkey/monkey_island/cc/ui/src/index.js b/monkey/monkey_island/cc/ui/src/index.js
index a80de72fe..06ce514e1 100644
--- a/monkey/monkey_island/cc/ui/src/index.js
+++ b/monkey/monkey_island/cc/ui/src/index.js
@@ -1,6 +1,5 @@
 import 'core-js/stable';
 import 'regenerator-runtime/runtime';
-import 'core-js/fn/object/assign';
 import React from 'react';
 import ReactDOM from 'react-dom';
 import App from './components/Main';