diff --git a/server.ts b/server.ts
index ee8a50d..f0acd72 100644
--- a/server.ts
+++ b/server.ts
@@ -529,7 +529,8 @@ async function initializeServer() {
       // Fallback to TanStack Start handler for all other routes
       '/*': async (req: Request) => {
         try {
-          return await handler.fetch(req)
+          const response = await handler.fetch(req)
+          return response as Response
         } catch (error) {
           log.error(`Server handler error: ${String(error)}`)
           return new Response('Internal Server Error', { status: 500 })