diff --git a/instr/index.html b/instr/index.html
index c369763..a7161ec 100644
--- a/instr/index.html
+++ b/instr/index.html
@@ -6,15 +6,15 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
   <meta name="description" content="Ushio-Net - Link the entire world!">
   <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsify-themeable@0/dist/css/theme-simple.css">
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.css">
+  <link rel="stylesheet" href="https://gcore.jsdelivr.net/npm/docsify-themeable@0/dist/css/theme-simple.css">
+  <link rel="stylesheet" href="//gcore.jsdelivr.net/npm/mermaid/dist/mermaid.min.css">
 <script type="text/javascript">block_aplayer = true;lang = ['zh'];</script>
 <script src="https://cdn.yimian.xyz/ushio-js/ushio-head.min.js"></script>
 <script type="text/javascript">page.proj = 'iotcat/ushio-net';</script>
 </head>
 <body>
   <div id="app">Loading...</div>
-  <script src="//cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
   <script>
     var num = 0;
     mermaid.initialize({ startOnLoad: false });
@@ -117,27 +117,27 @@
     }
   </script>
     <script type="text/javascript" src="https://cdn.yimian.xyz/ushio-js/ushio-footer.js"></script>
-  <!--<script src="//cdn.jsdelivr.net/npm/docsify/lib/docsify.min.js"></script>-->
-  <script src="https://cdn.jsdelivr.net/npm/docsify-themeable@0/dist/js/docsify-themeable.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/search.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/emoji.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/ga.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/external-script.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/zoom-image.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/docsify-copy-code"></script>
-  <script src="https://cdn.jsdelivr.net/npm/docsify@4"></script>
+  <!--<script src="//gcore.jsdelivr.net/npm/docsify/lib/docsify.min.js"></script>-->
+  <script src="https://gcore.jsdelivr.net/npm/docsify-themeable@0/dist/js/docsify-themeable.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify/lib/plugins/search.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify/lib/plugins/emoji.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify/lib/plugins/ga.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify/lib/plugins/external-script.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify/lib/plugins/zoom-image.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/docsify-copy-code"></script>
+  <script src="https://gcore.jsdelivr.net/npm/docsify@4"></script>
   <script src="//unpkg.com/docsify-count/dist/countable.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/docsify-tabs@1"></script>
+  <script src="https://gcore.jsdelivr.net/npm/docsify-tabs@1"></script>
 
-  <script src="//cdn.jsdelivr.net/npm/prismjs@1/components/prism-bash.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-cpp.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-json.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-lua.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-yaml.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-docker.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-arduino.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-http.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/prismjs@1.21.0/components/prism-matlab.min.js"></script>
+  <script src="//gcore.jsdelivr.net/npm/prismjs@1/components/prism-bash.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-cpp.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-json.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-lua.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-yaml.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-docker.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-arduino.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-http.min.js"></script>
+  <script src="https://gcore.jsdelivr.net/npm/prismjs@1.21.0/components/prism-matlab.min.js"></script>
 
 
   <script>
