diff --git a/src/webapp.ts b/src/webapp.ts
index 7b0a1dd..20a2a44 100644
--- a/src/webapp.ts
+++ b/src/webapp.ts
@@ -17,7 +17,7 @@ export async function serveApp(c: Context, subdomain: string): Promise<Response>
     if (app instanceof Hono)
         return app.fetch(c.req.raw)
     else
-        return toResponse(app(c))
+        return toResponse(await app(c))
 }
 
 export function apps(): string[] {