diff --git a/scripts/tags/copy.js b/scripts/tags/copy.js
index 2f49273..2be21dd 100644
--- a/scripts/tags/copy.js
+++ b/scripts/tags/copy.js
@@ -9,6 +9,8 @@
 
 'use strict';
 
+var copy_index = 0;
+
 hexo.extend.tag.register('copy', function(args) {
   args = hexo.args.map(args, ['width', 'git'], ['text']);
   if (args == undefined || args.text == undefined) {
@@ -27,9 +29,8 @@ hexo.extend.tag.register('copy', function(args) {
       text = 'https://github.com/' + text + '.git';
     }
   }
-  function generate_id(text) {
-    return 'copy-' + text.replace(/[^a-z|0-9|.:]/gi, '')
-  }
+
+  const copy_id = 'copy-' + ++copy_index + '-' + text.replace(/[^a-z|0-9|.:]/gi, '');
 
   var el = '';
   el += '<div class="tag-plugin copy"';
@@ -37,10 +38,9 @@ hexo.extend.tag.register('copy', function(args) {
     el += ' width="' + args.width + '"';
   }
   el += '>';
-  
-  el += '<input class="copy-area" readonly id="' + generate_id(text) + '"';
+  el += '<input class="copy-area" readonly id="' + copy_id + '"';
   el += ' value="' + text + '">';
-  el += '<button class="copy-btn" onclick="util.copy(&quot;' + generate_id(text) + '&quot;,&quot;Copied!&quot;)">';
+  el += '<button class="copy-btn" onclick="util.copy(&quot;' + copy_id + '&quot;,&quot;Copied!&quot;)">';
   el += '<svg class="icon copy-btn" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M5.75 1a.75.75 0 00-.75.75v3c0 .414.336.75.75.75h4.5a.75.75 0 00.75-.75v-3a.75.75 0 00-.75-.75h-4.5zm.75 3V2.5h3V4h-3zm-2.874-.467a.75.75 0 00-.752-1.298A1.75 1.75 0 002 3.75v9.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 13.25v-9.5a1.75 1.75 0 00-.874-1.515.75.75 0 10-.752 1.298.25.25 0 01.126.217v9.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-9.5a.25.25 0 01.126-.217z"></path></svg>';
   el += '</button>';