diff --git a/main.py b/main.py
index bb283ab..af5bd7c 100644
--- a/main.py
+++ b/main.py
@@ -34,7 +34,7 @@
 args = parser.parse_args()
 
 LOCAL_MODE = args.local
-DISABLE_REGISTER = args.disable_register
+DISABLE_REGISTER = args.disable_register or os.getenv('REGISTRATION_DISABLED', '').lower() in ('true', '1', 'yes')
 DISABLE_GUEST = args.disable_guest or os.getenv('DISABLE_GUEST', '').lower() in ('true', '1', 'yes')
 
 app = Flask(__name__, template_folder='web/templates', static_folder='web/static')
@@ -1437,4 +1437,4 @@ def open_browser():
     serve(app, host='0.0.0.0', port=5000, threads=8)
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()