diff --git a/graphene_django/types.py b/graphene_django/types.py
index fab4017..fbbc28f 100644
--- a/graphene_django/types.py
+++ b/graphene_django/types.py
@@ -94,6 +94,7 @@ def validate_only_fields(only_fields, all_field_names, model, type_):
             )
         )
 
+
 def validate_exclude_fields(exclude_fields, all_field_names, model, type_):
     # Validate exclude fields
     for name in exclude_fields or ():