diff --git a/mosqkiller/settings.py b/mosqkiller/settings.py
index 17b1994..2f09cec 100644
--- a/mosqkiller/settings.py
+++ b/mosqkiller/settings.py
@@ -211,7 +211,7 @@ CELERY_TIMEZONE = 'Asia/Shanghai'
 CELERY_BEAT_SCHEDULE = {
     'update-daily-statistic': {
         'task': 'mosquito.tasks.update_daily_statistic',
-        'schedule': crontab(hour='*/1', minute=0),
+        'schedule': crontab(minute="*/30"),
     },
     'update-mosq-device-info': {
         'task': 'mosquito.tasks.update_mosq_device_info',