diff --git a/layout/article-content.ejs b/layout/article-content.ejs
index 26e85c8..431bcd5 100644
--- a/layout/article-content.ejs
+++ b/layout/article-content.ejs
@@ -8,7 +8,7 @@
         <% if (theme.base_info.author || config.author) { %>
             <div class="article-header">
                 <div class="avatar">
-                    <%- image_tag('images/avatar.png') %>
+                    <%- __image_tag('images/avatar.png') %>
                 </div>
                 <div class="info">
                     <div class="author">
diff --git a/scripts/helpers/helper.js b/scripts/helpers/helper.js
index c90231c..af03c19 100644
--- a/scripts/helpers/helper.js
+++ b/scripts/helpers/helper.js
@@ -72,7 +72,6 @@ hexo.extend.helper.register('__css', function (path) {
   } else {
     return _css(path);
   }
-
 });
 
 hexo.extend.helper.register('__favicon_tag', function (path) {
@@ -82,6 +81,14 @@ hexo.extend.helper.register('__favicon_tag', function (path) {
   } else {
     return _favicon_tag(path);
   }
-
+});
+
+hexo.extend.helper.register('__image_tag', function (path) {
+  const _image_tag = hexo.extend.helper.get('image_tag').bind(hexo);
+  if (this.theme.cdn.enable) {
+    return `<img src="//cdn.jsdelivr.net/npm/hexo-theme-keep@${this.theme.version}/source/${path}">`
+  } else {
+    return _image_tag(path);
+  }
 });