diff --git a/internal/biz/cron_notice.go b/internal/biz/cron_notice.go
index 13d5af9..e2fe857 100644
--- a/internal/biz/cron_notice.go
+++ b/internal/biz/cron_notice.go
@@ -88,7 +88,7 @@ func (v *VoucherBiz) timeSliceQuery(ctx context.Context, startTime, endTime time
 	duration := 2 * time.Hour
 
 	eg := new(errgroup.Group)
-	eg.SetLimit(10)
+	eg.SetLimit(8)
 
 	for start := startTime; start.Before(endTime); start = start.Add(duration) {