diff --git a/PyTado/interface/api/my_tado.py b/PyTado/interface/api/my_tado.py
index 55ed4db..47ce32b 100644
--- a/PyTado/interface/api/my_tado.py
+++ b/PyTado/interface/api/my_tado.py
@@ -231,7 +231,7 @@ def set_timetable(self, zone: int, timetable: Timetable) -> None:
         request.command = f"zones/{zone:d}/schedule/activeTimetable"
         request.action = Action.CHANGE
         request.payload = {"id": timetable}
-        request.mode = Mode.PLAIN
+        request.mode = Mode.OBJECT
 
         self._http.request(request)
 
@@ -258,7 +258,7 @@ def set_schedule(self, zone, timetable: Timetable, day, data):
         request.command = f"zones/{zone:d}/schedule/timetables/{timetable:d}/blocks/{day}"
         request.action = Action.CHANGE
         request.payload = data
-        request.mode = Mode.PLAIN
+        request.mode = Mode.OBJECT
 
         return self._http.request(request)