diff --git a/custom_components/gooddriver/device_tracker.py b/custom_components/gooddriver/device_tracker.py
index c6aa7bf..8e7a657 100644
--- a/custom_components/gooddriver/device_tracker.py
+++ b/custom_components/gooddriver/device_tracker.py
@@ -112,7 +112,7 @@ def icon(self):
         
     @property
     def source_type(self):
-        return "GPS"
+        return "gps"
 
     @property
     def latitude(self):                
@@ -156,4 +156,4 @@ async def async_update(self):
         if self._gps_conver == True:
             self._coords = gcj02towgs84(self.coordinator.data["thislon"], self.coordinator.data["thislat"])
         else:
-            self._coords = [self.coordinator.data["thislon"], self.coordinator.data["thislat"]]
\ No newline at end of file
+            self._coords = [self.coordinator.data["thislon"], self.coordinator.data["thislat"]]