diff --git a/theme/classic.php b/theme/classic.php
index e4994ff..5bcf94a 100644
--- a/theme/classic.php
+++ b/theme/classic.php
@@ -513,7 +513,7 @@
     <div style="color: rgba(247,247,249,0);"><?php echo date("Y-m-d H:i:s")." ".getconstStr('Week')[date("w")]." ".$_SERVER['REMOTE_ADDR'];?></div>
 </body>
 <?php if ($files) { ?>
-<?php if (isset($files['children']['head.md'])||isset($files['children']['readme.md'])) { ?><link rel="stylesheet" href="//github.com/typora/typora-default-themes/blob/master/themes/gothic.css">
+<?php if (isset($files['children']['head.md'])||isset($files['children']['readme.md'])) { ?><link rel="stylesheet" href="//github.com/typora/typora-default-themes/blob/master/themes/github.css">
 <script type="text/javascript" src="//unpkg.zhimg.com/marked@0.6.2/marked.min.js"></script><?php } ?>
 <?php if (isset($files['folder']) && $_SERVER['is_guestup_path'] && !$_SERVER['admin']) { ?><script type="text/javascript" src="//cdn.bootcss.com/spark-md5/3.0.0/spark-md5.min.js"></script><?php } ?>
 <?php if ($pdfurl!='') { ?><script src="//cdn.bootcss.com/pdf.js/2.3.200/pdf.min.js"></script><?php } ?>