diff --git a/index.html b/index.html
index ef6d5d423..664880562 100644
--- a/index.html
+++ b/index.html
@@ -10,6 +10,11 @@
   <body>
     <div id="app"></div>
     <!--<script src="https://app.codesponsor.io/scripts/qFcVkt4f3DQEg4zrwINGVg?theme=light&height=250&width=240"></script>-->
+    <script>
+      if (!window.Promise) {
+        document.write('<script src="//shadow.elemecdn.com/npm/es6-promise@4.1.1/dist/es6-promise.min.js"><\/script><script>ES6Promise.polyfill()<\/script>')
+      }
+    </script>
     <script src="//cdn.jsdelivr.net/npm/vue@2.3.0/dist/vue.runtime.min.js"></script>
     <script src="//cdn.jsdelivr.net/npm/vue-router@2.1.1/dist/vue-router.min.js"></script>
   <script type="text/javascript" src="manifest.bc6172e.js"></script><script type="text/javascript" src="element-ui.4bc2365.js"></script><script type="text/javascript" src="docs.f6cb4ad.js"></script></body>
