diff --git a/src/.htaccess.njk b/src/.htaccess.njk
index 57a93c4f..ea7ab520 100644
--- a/src/.htaccess.njk
+++ b/src/.htaccess.njk
@@ -2,6 +2,7 @@
 permalink: .htaccess
 eleventyExcludeFromCollections: true
 ---
+ErrorDocument 404 /404.html
 
 <FilesMatch "\.(ico|svg|avif|jpg|png|gif|js|css|woff2)$">
 Header set Cache-Control "max-age=31536000, public"