diff --git a/src/pages/posts/index.astro b/src/pages/posts/index.astro
index 76472f6..af379cf 100644
--- a/src/pages/posts/index.astro
+++ b/src/pages/posts/index.astro
@@ -13,7 +13,7 @@ const sortedPosts = getSortedPosts(posts);
 ---
 
 <Layout title="Welcome to Astro.">
-  <Header />
+  <Header activeNav="posts" />
   <Main pageTitle="Posts" pageDesc="All the tags used in posts.">
     <ul>
       {