diff --git a/apps/mosquito/tasks.py b/apps/mosquito/tasks.py
index 4981508..740b501 100644
--- a/apps/mosquito/tasks.py
+++ b/apps/mosquito/tasks.py
@@ -69,7 +69,10 @@ def update_daily_statistic():
         _date_list.sort()
         is_first = True
         for d in _date_list:
-            obj = MosqPostStatistic.objects.get(date=d)
+            try:
+                obj = MosqPostStatistic.objects.get(date=d)
+            except MosqPostStatistic.DoesNotExist:
+                obj = None
             if is_first:
                 if obj:
                     obj.total, obj.increment = ret[d], ret[d]