diff --git a/graphene/types/inputobjecttype.py b/graphene/types/inputobjecttype.py
index 12095bb3..da886d18 100644
--- a/graphene/types/inputobjecttype.py
+++ b/graphene/types/inputobjecttype.py
@@ -23,7 +23,7 @@ class InputObjectTypeContainer(dict, BaseType):
 
 
 class InputObjectTypeOptions(BaseOptions):
-    fields: Dict[str, InputField] = None
+    fields: Dict[str, InputField] = None  # typing: ignore
     container: InputObjectTypeContainer = None