diff --git a/bali/resources/model_resource.py b/bali/resources/model_resource.py
index 18604fb..8f4e347 100644
--- a/bali/resources/model_resource.py
+++ b/bali/resources/model_resource.py
@@ -38,6 +38,8 @@ def update(self, schema_in: schema = None, pk=None):
         item = self.model.first(id=pk)
         # noinspection PyUnresolvedReferences
         for k, v in schema_in.dict().items():
+            if v is None:
+                continue
             setattr(item, k, v)
         return item.save()