diff --git a/custom_components/optimal_humidity/sensor.py b/custom_components/optimal_humidity/sensor.py
index 5fb2411..eba43d0 100644
--- a/custom_components/optimal_humidity/sensor.py
+++ b/custom_components/optimal_humidity/sensor.py
@@ -30,8 +30,6 @@
 
 from homeassistant import util
 
-from homeassistant.util.temperature import fahrenheit_to_celsius
-
 from homeassistant.util.unit_system import METRIC_SYSTEM
 
 from homeassistant.components.sensor import (
@@ -318,7 +316,7 @@ def _update_temp_sensor(state):
             return None
 
         if unit == TEMP_FAHRENHEIT:
-            return fahrenheit_to_celsius(temp)
+            return util.temperature.fahrenheit_to_celsius(temp)
         if unit == TEMP_CELSIUS:
             return temp
         _LOGGER.warning(