diff --git a/production.py b/production.py
index fc3d64d..6ae80cf 100644
--- a/production.py
+++ b/production.py
@@ -285,8 +285,8 @@ def main() -> None:
     # args.host and args.port always have values because of 'default' in ArgumentParser.
     # We'll re-parse or check the sys.argv.
     
-    host    = args.host or default_host or '0.0.0.0'
-    port    = args.port or default_port or 5000
+    host    = getattr(args, 'host', None) or default_host or '0.0.0.0'
+    port    = getattr(args, 'port', None) or default_port or 5000
     workers = getattr(args, 'workers', None) or default_workers
 
     if args.command == 'start':