diff --git a/src/back/main.js b/src/back/main.js
index b057dbb..7b30427 100644
--- a/src/back/main.js
+++ b/src/back/main.js
@@ -2,7 +2,7 @@ const buildApp = require("./buildApp");
 
 const app = buildApp();
 
-const PORT = 3003;
+const PORT = process.env.PORT || 3003;
 app.listen(PORT, () => {
   console.log(`Server running on port ${PORT}`);
 });