diff --git a/apps/mosquito/tasks.py b/apps/mosquito/tasks.py
index 0903f47..793cd91 100644
--- a/apps/mosquito/tasks.py
+++ b/apps/mosquito/tasks.py
@@ -14,7 +14,7 @@ django.setup()
 
 from counter.models import DeviceCount
 from counter.models import DeviceInfo as D1
-from mosquito.models import MosqPostStatistic, DevicePostStatistic, DeviceInfo, Org, WeatherStationDeviceInfo
+from mosquito.models import MosqPostStatistic, DevicePostStatistic, DeviceInfo, Org
 
 def max_count(x, y):
     if x.count > y.count: