diff --git a/api/change_set.py b/api/change_set.py
index 571fe0d..64c9798 100644
--- a/api/change_set.py
+++ b/api/change_set.py
@@ -11,4 +11,4 @@ class ChangeSet:
         self.deleted.append({ 'type': type, 'id': id })
 
     def update(self, type: str, id: str, property_name: str, property_type: str, property_value: str) -> None:
-        self.updated.append({ 'type': type, 'id': id, 'property': property, 'property_type': property_type,  'property_value': property_value })
\ No newline at end of file
+        self.updated.append({ 'type': type, 'id': id, 'property': property_name, 'property_type': property_type,  'property_value': property_value })
\ No newline at end of file