diff --git a/astro.config.ts b/astro.config.ts
index e1bc6cb..704e41f 100644
--- a/astro.config.ts
+++ b/astro.config.ts
@@ -18,7 +18,6 @@ import { remarkReadingTime } from './src/plugins/remark-reading-time.mjs'
 
 const url = themeConfig.site.url
 const locale = themeConfig.global.locale
-const isKatexEnabled = themeConfig.global.katex
 const linkPrefetch = themeConfig.preload.linkPrefetch
 const imageHostURL = themeConfig.preload.imageHostURL
 const imageConfig = imageHostURL
@@ -32,28 +31,6 @@ const imageConfig = imageHostURL
     }
   : {}
 
-const remarkPlugins = [
-  remarkDirective,
-  ...(isKatexEnabled ? [remarkMath] : []),
-  remarkAdmonitions,
-  remarkGithubCard,
-  remarkReadingTime,
-]
-
-const rehypePlugins = [
-  rehypeSlug,
-  ...(isKatexEnabled ? [rehypeKatex] : []),
-  rehypeImgToFigure,
-  [
-    rehypeExternalLinks,
-    {
-      target: '_blank',
-      rel: ['nofollow', 'noopener', 'noreferrer', 'external'],
-      protocols: ['http', 'https', 'mailto'],
-    },
-  ],
-] as any[]
-
 export default defineConfig({
   site: url,
   base: '/',
@@ -84,8 +61,26 @@ export default defineConfig({
     robotsTxt(),
   ],
   markdown: {
-    remarkPlugins,
-    rehypePlugins,
+    remarkPlugins: [
+      remarkDirective,
+      remarkMath,
+      remarkAdmonitions,
+      remarkGithubCard,
+      remarkReadingTime,
+    ],
+    rehypePlugins: [
+      rehypeSlug,
+      rehypeKatex,
+      rehypeImgToFigure,
+      [
+        rehypeExternalLinks,
+        {
+          target: '_blank',
+          rel: ['nofollow', 'noopener', 'noreferrer', 'external'],
+          protocols: ['http', 'https', 'mailto'],
+        },
+      ],
+    ],
     shikiConfig: {
       // Available themes: https://shiki.style/themes
       themes: {