diff --git a/src/404.njk b/src/404.njk
index cda648eb..d530f7b3 100644
--- a/src/404.njk
+++ b/src/404.njk
@@ -1,7 +1,7 @@
 ---
 layout: misc/base
-title: 404: Page Not Found
-h1: 404: Page Not Found
+title: "404: Page Not Found"
+h1: "404: Page Not Found"
 eleventyExcludeFromCollections: true
 permalink: /404.html
 ---