diff --git a/views/admin_classify.ejs b/views/admin_classify.ejs
index b52fa53..7db3ef8 100644
--- a/views/admin_classify.ejs
+++ b/views/admin_classify.ejs
@@ -109,10 +109,10 @@
         </div>
     </div>
 </div>
-<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
+<link href="https://cdn.bootcss.com/element-ui/2.13.0/theme-chalk/index.css" rel="stylesheet">
 <!-- 引入组件库 -->
 <script src="https://cdn.jsdelivr.net/npm/vue"></script>
-<script src="https://unpkg.com/element-ui/lib/index.js"></script>
+<script src="https://cdn.bootcss.com/element-ui/2.13.0/index.js"></script>
 <% include problem_table %>
 <script>
   new window.Vue({
diff --git a/views/header.ejs b/views/header.ejs
index 947b7c1..a17101c 100644
--- a/views/header.ejs
+++ b/views/header.ejs
@@ -33,10 +33,9 @@
       <link href="<%- this.builtInCdnUrl %>/google-fonts/exo-2.css" rel="stylesheet">
     <% } %>
     <script src="<%- lib('jquery/3.3.1/jquery.min.js') %>"></script>
-    <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css" />
     <!-- 引入组件库 -->
     <script src="https://cdn.jsdelivr.net/npm/vue"></script>
-    <script src="https://unpkg.com/element-ui/lib/index.js"></script>
+    <script src="https://cdn.bootcss.com/element-ui/2.13.0/index.js"></script>
     <% if (syzoj.config.google_analytics && syzoj.config.google_analytics !== 'UA-XXXXXXXX-X') { %>
     <script>
       (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){