diff --git a/graphene_django/__init__.py b/graphene_django/__init__.py
index 63197ab..62318e9 100644
--- a/graphene_django/__init__.py
+++ b/graphene_django/__init__.py
@@ -3,4 +3,9 @@ from .types import DjangoObjectType
 
 __version__ = "2.9.1"
 
-__all__ = ["__version__", "DjangoObjectType", "DjangoListField", "DjangoConnectionField"]
+__all__ = [
+    "__version__",
+    "DjangoObjectType",
+    "DjangoListField",
+    "DjangoConnectionField",
+]