diff --git a/src/parts/head.html b/src/parts/head.html
index 19c66cf..66d6b89 100644
--- a/src/parts/head.html
+++ b/src/parts/head.html
@@ -5,6 +5,7 @@
 <script src="https://cdn.tailwindcss.com"></script>
 <script src="https://cdn.jsdelivr.net/npm/tiny-ripple@0.2.0"></script>
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/github-markdown-css@5.8.1/github-markdown-light.min.css"/>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.11/dist/katex.min.css"/>
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.11.1/build/styles/github.min.css"/>
 <link rel="stylesheet" href="/src/style.css"/>
 <script defer src="https://cdn.jsdelivr.net/npm/cash-dom/dist/cash.min.js"></script>