diff --git a/src/server/static.ts b/src/server/static.ts
index 208897d..11e2436 100644
--- a/src/server/static.ts
+++ b/src/server/static.ts
@@ -33,6 +33,12 @@ export async function serveStatic(appName: string, req: Request): Promise<Respon
     return new Response(Bun.file(htmlPath))
   }
 
+  // SPA fallback: serve root index.html for unmatched paths
+  const rootIndex = join(pubDir, 'index.html')
+  if (existsSync(rootIndex)) {
+    return new Response(Bun.file(rootIndex))
+  }
+
   return new Response('Not Found', { status: 404 })
 }