diff --git a/index.js b/index.js
index 92018ba..ab32179 100644
--- a/index.js
+++ b/index.js
@@ -7,7 +7,7 @@ const app = express();
 app.use(cookieParser());
 
 var server = require("http").createServer(app);
-var port = 3000;
+var port = process.env.PORT;
 
 server.listen(port, function () {
   console.log("Server listening on port " + port);