diff --git a/backend/main.py b/backend/main.py
index c77ab27..3946c63 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -168,9 +168,13 @@ if __name__ == "__main__":
         print(f"[INFO] Starting server in {environment} environment...")
         print(f"[INFO] SSL Certificate Path: {cert_path}")
         print(f"[INFO] SSL Key Path: {key_path}")
-        port = int(
-            config.get("PORT", os.getenv("PORT", 8000))
-        )  # Fetch port from config or environment
+        port = config.get("PORT", os.getenv("PORT"))
+        if not port:
+            print(
+                "[ERROR] No port defined in config or environment variables. Aborting!"
+            )
+            sys.exit(1)  # Exit if no port is defined
+        port = int(port)
         print(f"[INFO] Running on port {port}")
         uvicorn.run(
             app,
diff --git a/config_prod.json b/config_prod.json
index 8983e86..121d2a8 100644
--- a/config_prod.json
+++ b/config_prod.json
@@ -4,6 +4,7 @@
     "OPENAPI_URL": "https://mx-aare-test.psi.ch:1492/openapi.json",
     "SCHEMA_PATH": "./src/openapi.json",
     "OUTPUT_DIRECTORY": "./openapi",
+    "PORT": 1492,
     "SSL_KEY_PATH": "/home/jungfrau/heidi-v2/backend/ssl/mx-aare-test.psi.ch.key",
     "SSL_CERT_PATH": "/home/jungfrau/heidi-v2/backend/ssl/mx-aare-test.psi.ch.pem"
 }
\ No newline at end of file