diff --git a/src/rougail/convert.py b/src/rougail/convert.py
index f3de86d01..d98f76d03 100644
--- a/src/rougail/convert.py
+++ b/src/rougail/convert.py
@@ -67,7 +67,6 @@ from .object_model import (
 from .error import DictConsistencyError
 
 
-
 property_types = Union[Literal[True], Calculation]
 properties_types = Dict[str, property_types]