diff --git a/third_party/2and3/pynamodb/models.pyi b/third_party/2and3/pynamodb/models.pyi
index 4bc07e7a0..19d5f6cc1 100644
--- a/third_party/2and3/pynamodb/models.pyi
+++ b/third_party/2and3/pynamodb/models.pyi
@@ -29,7 +29,7 @@ class Model(metaclass=MetaModel):
     @classmethod
     def batch_write(cls: Type[_T], auto_commit: bool = ...) -> BatchWrite[_T]: ...
     def delete(self, conditional_operator: Optional[Text] = ..., **expected_values) -> Any: ...
-    def update(self, attributes: Optional[Dict[Text, Dict[Text, Any]]], actions: Optional[List[Any]], condition: Optional[Any], conditional_operator: Optional[Text] = ..., **expected_values) -> Any: ...
+    def update(self, attributes: Optional[Dict[Text, Dict[Text, Any]]] = ..., actions: Optional[List[Any]] = ..., condition: Optional[Any] = ..., conditional_operator: Optional[Text] = ..., **expected_values) -> Any: ...
     def update_item(self, attribute: Text, value: Optional[Any] = ..., action: Optional[Text] = ..., conditional_operator: Optional[Text] = ..., **expected_values): ...
     def save(self, condition: Optional[Any] = ..., conditional_operator: Optional[Text] = ..., **expected_values) -> Dict[str, Any]: ...
     def refresh(self, consistent_read: bool = ...): ...