diff --git a/src/numpydantic/validation/dtype.py b/src/numpydantic/validation/dtype.py
index d930fc0..5eeb124 100644
--- a/src/numpydantic/validation/dtype.py
+++ b/src/numpydantic/validation/dtype.py
@@ -3,6 +3,7 @@ Helper functions for validation of dtype.
 
 For literal dtypes intended for use by end-users, see :mod:`numpydantic.dtype`
 """
+
 import sys
 from typing import Any, Union, get_args, get_origin