diff --git a/web/svelte.config.js b/web/svelte.config.js
index 87d6c9df..3f388721 100644
--- a/web/svelte.config.js
+++ b/web/svelte.config.js
@@ -25,7 +25,7 @@ const config = {
             // these options are set automatically — see below
             pages: 'build',
             assets: 'build',
-            fallback: undefined,
+            fallback: '404.html',
             precompress: false,
             strict: true
         }),