diff --git a/src/layouts/BaseLayout.astro b/src/layouts/BaseLayout.astro
index 37d8c70..b155bbf 100644
--- a/src/layouts/BaseLayout.astro
+++ b/src/layouts/BaseLayout.astro
@@ -9,7 +9,7 @@ const canonicalURL = new URL(Astro.url.pathname, Astro.site);
 ---
 
 <!doctype html>
-<html lang="en">
+<html lang="en" data-theme="dark">
   <head>
     <meta charset="utf-8" />
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
