diff --git a/sync/views.py b/sync/views.py
index 03c7a14..4902972 100644
--- a/sync/views.py
+++ b/sync/views.py
@@ -183,7 +183,7 @@ class SynchronizationApi(HierarchyApiView):
         if not decoded_last_update:
             return Response({"error": "last_update parameter is required"}, status=status.HTTP_400_BAD_REQUEST)
         try:
-            last_update = timezone.datetime.fromisoformat(decoded_last_update).astimezone(timezone.utc)
+            last_update = timezone.datetime.fromisoformat(decoded_last_update)
         except ValueError:
             return Response({"error": f"Invalid date format for last_update: {decoded_last_update}"}, status=status.HTTP_400_BAD_REQUEST)