fix issue 70

ormar/__init__.py

@@ -44,7 +44,7 @@ class UndefinedType:  # pragma no cover
 
 Undefined = UndefinedType()
 
-__version__ = "0.7.1"
+__version__ = "0.7.2"
 __all__ = [
     "Integer",
     "BigInteger",

ormar/models/model.py

@@ -269,8 +269,7 @@ class Model(NewBaseModel):
 
     async def update(self: T, **kwargs: Any) -> T:
         if kwargs:
-            new_values = {**self.dict(), **kwargs}
-            self.from_dict(new_values)
+            self.from_dict(kwargs)
 
         if not self.pk:
             raise ModelPersistenceError(