diff --git a/.env.sample b/.env.sample
index 9281d30..b29529a 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1 +1,2 @@
 REBRICKABLE_API_KEY=xxxx
+DOMAIN_NAME=https://lego.example.com
diff --git a/app.py b/app.py
index f945627..cfca150 100644
--- a/app.py
+++ b/app.py
@@ -19,7 +19,7 @@ from werkzeug.middleware.proxy_fix import ProxyFix
 
 app = Flask(__name__)
 app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_port=1, x_prefix=1)
-socketio = SocketIO(app,cors_allowed_origins="https://lego.baerentsen.space")
+socketio = SocketIO(app,cors_allowed_origins=os.getenv("DOMAIN_NAME"))
 count = 0
 
 @app.route('/favicon.ico')