diff --git a/layouts/post.shtml b/layouts/post.shtml
index 08111ec..0fff025 100644
--- a/layouts/post.shtml
+++ b/layouts/post.shtml
@@ -11,7 +11,7 @@
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   </ctx>
   <ctx :if="$page.custom.getOr('mermaid', false)">
-    <script defer src="https://mirrors.sustech.edu.cn/cdnjs/ajax/libs/mermaid/11.12.0/mermaid.min.js" integrity="sha512-5TKaYvhenABhlGIKSxAWLFJBZCSQw7HTV7aL1dJcBokM/+3PNtfgJFlv8E6Us/B1VMlQ4u8sPzjudL9TEQ06ww==" crossorigin="anonymous" onload="mermaid.run();"></script>
+    <script defer src="https://mirrors.sustech.edu.cn/cdnjs/ajax/libs/mermaid/11.12.0/mermaid.min.js" integrity="sha512-5TKaYvhenABhlGIKSxAWLFJBZCSQw7HTV7aL1dJcBokM/+3PNtfgJFlv8E6Us/B1VMlQ4u8sPzjudL9TEQ06ww==" crossorigin="anonymous" onload="mermaid.initialize({theme: window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'default'}); mermaid.run();"></script>
   </ctx>
 </head>
 <div id="content">