diff --git a/deepmd/main.py b/deepmd/main.py
index be489f8eda..f3738ff5b4 100644
--- a/deepmd/main.py
+++ b/deepmd/main.py
@@ -745,6 +745,7 @@ def main_parser() -> argparse.ArgumentParser:
     )
     parser_convert_backend.add_argument("INPUT", help="The input model file.")
     parser_convert_backend.add_argument("OUTPUT", help="The output model file.")
+
     return parser