diff --git a/custom_components/dual_smart_thermostat/managers/preset_manager.py b/custom_components/dual_smart_thermostat/managers/preset_manager.py
index e9e217e..3528788 100644
--- a/custom_components/dual_smart_thermostat/managers/preset_manager.py
+++ b/custom_components/dual_smart_thermostat/managers/preset_manager.py
@@ -192,16 +192,22 @@ def apply_old_state(self, old_state: State):
                         )
                         self._environment.saved_target_temp = float(old_temperature)
 
-                    self._environment.target_temp_low = (
-                        float(old_target_temp_low)
-                        if old_target_temp_low
-                        else float(preset.to_dict.get(ATTR_TARGET_TEMP_LOW))
-                    )
-                    self._environment.target_temp_high = (
-                        float(old_target_temp_high)
-                        if old_target_temp_high
-                        else float(preset.to_dict.get(ATTR_TARGET_TEMP_HIGH))
-                    )
+                    preset_target_temp_low = preset.to_dict.get(ATTR_TARGET_TEMP_LOW)
+                    preset_target_temp_high = preset.to_dict.get(ATTR_TARGET_TEMP_HIGH)
+
+                    if preset_target_temp_low is not None:
+                        self._environment.target_temp_low = (
+                            float(old_target_temp_low)
+                            if old_target_temp_low
+                            else float(preset_target_temp_low)
+                        )
+
+                    if preset_target_temp_high is not None:
+                        self._environment.target_temp_high = (
+                            float(old_target_temp_high)
+                            if old_target_temp_high
+                            else float(preset_target_temp_high)
+                        )
 
         elif self._preset_modes and old_pres_mode in self._presets:
             _LOGGER.debug("Restoring previous preset mode target: %s", old_pres_mode)
diff --git a/custom_components/dual_smart_thermostat/manifest.json b/custom_components/dual_smart_thermostat/manifest.json
index f595d47..310b476 100644
--- a/custom_components/dual_smart_thermostat/manifest.json
+++ b/custom_components/dual_smart_thermostat/manifest.json
@@ -7,11 +7,14 @@
   "dependencies": [
     "climate",
     "sensor",
-    "switch"
+    "switch",
+    "input_select",
+    "input_boolean",
+    "input_number"
   ],
   "documentation": "https://github.com/swingerman/ha-dual-smart-thermostat.git",
   "iot_class": "local_polling",
   "issue_tracker": "https://github.com/swingerman/ha-dual-smart-thermostat/issues",
   "requirements": [],
   "version": "v0.9.9"
-}
+}
\ No newline at end of file