diff --git a/src/components/TableOfContents.astro b/src/components/TableOfContents.astro
index 5ef28f0..0ec0f71 100644
--- a/src/components/TableOfContents.astro
+++ b/src/components/TableOfContents.astro
@@ -11,7 +11,7 @@ const { headings } = Astro.props;
 
 <details
   id="toc"
-  class="sticky top-10 z-10 -translate-y-px border border-neutral-300 bg-white xl:top-2 dark:border-neutral-600 dark:bg-neutral-800"
+  class="sticky top-10 z-30 -translate-y-px border border-neutral-300 bg-white xl:top-2 dark:border-neutral-600 dark:bg-neutral-800"
 >
   <summary
     title="Table of contents"