diff --git a/.appengine/app.yaml b/.appengine/app.yaml
index cba46a3..407be8c 100644
--- a/.appengine/app.yaml
+++ b/.appengine/app.yaml
@@ -182,3 +182,10 @@ handlers:
     secure: always
     http_headers:
       Content-Type: text/html; charset=utf-8
+
+  - url: /.*
+    static_files: .build/index.html
+    upload: .build/index.html
+    secure: always
+    http_headers:
+      Content-Type: text/html; charset=utf-8