diff --git a/server.js b/server.js
index 62a1e6c..c12febb 100644
--- a/server.js
+++ b/server.js
@@ -3,6 +3,7 @@ const bodyParser = require('body-parser');
 const cors = require('cors');
 const https = require('https');
 const fs = require('fs');
+require('dotenv').config();
 const sequelize = require('./config/database');
 const authRouter = require('./routes/auth');
 const eventTypesRouter = require('./routes/eventtypes');
@@ -19,7 +20,7 @@ const imageRouter = require('./routes/image');
 const filesRouter = require('./routes/files');
 
 const app = express();
-const PORT = 3000;
+const PORT = parseInt(process.env.PORT, 10) || 3000;
 
 // CORS mit Whitelist und tolerantem Fallback für fehlende Origin-Header
 const allowedOrigins = (process.env.ALLOWED_ORIGINS || '')