diff --git a/apps/server/src/index.ts b/apps/server/src/index.ts
index cfe8aa1..9207700 100644
--- a/apps/server/src/index.ts
+++ b/apps/server/src/index.ts
@@ -26,7 +26,7 @@ registerRoutes(app);
 // start Bun.serve with WebSocket support.
 if (typeof Bun !== "undefined" && !process.env.BUN_TEST) {
   Bun.serve({
-    port: 3000,
+    port: Number(process.env.PORT ?? 3000),
     hostname: "0.0.0.0",
     websocket: shoppingWsHandlers,
     async fetch(req: Request, server) {