diff --git a/setup_cfg_fmt.py b/setup_cfg_fmt.py
index b246418..574a9f6 100644
--- a/setup_cfg_fmt.py
+++ b/setup_cfg_fmt.py
@@ -494,7 +494,7 @@ def main(argv: Optional[Sequence[str]] = None) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*')
     parser.add_argument('--min-py3-version', type=_ver_type, default=(3, 6))
-    parser.add_argument('--max-py-version', type=_ver_type, default=(3, 9))
+    parser.add_argument('--max-py-version', type=_ver_type, default=(3, 10))
     args = parser.parse_args(argv)
 
     retv = 0