diff --git a/src/tadoasync/models.py b/src/tadoasync/models.py
index e5a459e..81cd51e 100644
--- a/src/tadoasync/models.py
+++ b/src/tadoasync/models.py
@@ -514,8 +514,8 @@ class ZoneState(DataClassORJSONMixin):  # pylint: disable=too-many-instance-attr
         metadata=field_options(alias="nextTimeBlock")
     )
 
-    sensor_data_points: SensorDataPoints | dict[Any, Any] = field(
-        default_factory=dict, metadata=field_options(alias="sensorDataPoints")
+    sensor_data_points: SensorDataPoints | None = field(
+        metadata=field_options(alias="sensorDataPoints")
     )
     overlay: Overlay | None = None
     geolocation_override_disable_time: str | None = field(
@@ -569,6 +569,13 @@ class ZoneState(DataClassORJSONMixin):  # pylint: disable=too-many-instance-attr
     open_window_attr: OpenWindow | None = None
     is_away: bool = False
 
+    @classmethod
+    def __pre_deserialize__(cls, d: dict[str, Any]) -> dict[str, Any]:
+        """Pre deserialize hook."""
+        if not d["sensorDataPoints"]:
+            d["sensorDataPoints"] = None
+        return d
+
 
 @dataclass
 class OpenWindow(DataClassORJSONMixin):
diff --git a/src/tadoasync/tadoasync.py b/src/tadoasync/tadoasync.py
index 713ac7b..8fcc9ef 100644
--- a/src/tadoasync/tadoasync.py
+++ b/src/tadoasync/tadoasync.py
@@ -48,7 +48,6 @@
     GetMe,
     HomeState,
     MobileDevice,
-    SensorDataPoints,
     TemperatureOffset,
     Weather,
     Zone,
@@ -446,11 +445,7 @@ async def _request(
 
     async def update_zone_data(self, data: ZoneState) -> None:  # pylint: disable=too-many-branches
         """Update the zone data."""
-        if (isinstance(data.sensor_data_points, SensorDataPoints)) and (
-            hasattr(data, "sensor_data_points")
-            and data.sensor_data_points
-            and data.sensor_data_points != {}
-        ):
+        if data.sensor_data_points is not None:
             temperature = float(data.sensor_data_points.inside_temperature.celsius)
             data.current_temp = temperature
             data.current_temp_timestamp = (
diff --git a/tests/__snapshots__/test_tado.ambr b/tests/__snapshots__/test_tado.ambr
index 84ca37c..5630f49 100644
--- a/tests/__snapshots__/test_tado.ambr
+++ b/tests/__snapshots__/test_tado.ambr
@@ -2710,8 +2710,7 @@
     'power': 'ON',
     'precision': None,
     'preparation': False,
-    'sensor_data_points': dict({
-    }),
+    'sensor_data_points': None,
     'setting': dict({
       'fan_level': None,
       'fan_speed': None,
@@ -2817,8 +2816,7 @@
     'power': 'ON',
     'precision': None,
     'preparation': False,
-    'sensor_data_points': dict({
-    }),
+    'sensor_data_points': None,
     'setting': dict({
       'fan_level': None,
       'fan_speed': None,
@@ -2919,8 +2917,7 @@
     'power': 'OFF',
     'precision': None,
     'preparation': False,
-    'sensor_data_points': dict({
-    }),
+    'sensor_data_points': None,
     'setting': dict({
       'fan_level': None,
       'fan_speed': None,