diff --git a/mindinsight/ui/babel.config.js b/mindinsight/ui/babel.config.js
index 02c5eb5369ee692feedb9893a7097b497ac9b486..752e3192fd125e72b380c2af9236f58919f8ddaa 100644
--- a/mindinsight/ui/babel.config.js
+++ b/mindinsight/ui/babel.config.js
@@ -18,7 +18,7 @@ module.exports = {
     [
       '@vue/app',
       {
-        polyfills: ['es6.promise', 'es6.symbol'],
+        polyfills: ['es.promise', 'es.symbol'],
       },
     ],
   ],
diff --git a/mindinsight/ui/package.json b/mindinsight/ui/package.json
index 95c14a1ca7789a13a1d19e2f2188126e391fbec8..45787b1ff02498946ac4f7a87b304a71d100b013 100644
--- a/mindinsight/ui/package.json
+++ b/mindinsight/ui/package.json
@@ -24,7 +24,6 @@
     "@intlify/vue-i18n-loader": "0.6.1",
     "@vue/cli-service": "4.1.0",
     "@vue/cli-plugin-babel": "4.1.0",
-    "babel-core": "6.26.0",
     "babel-eslint": "10.0.3",
     "eslint": "6.6.0",
     "eslint-config-google": "0.13.0",