diff --git a/pkg/notifier/slacknotifier/slack.go b/pkg/notifier/slacknotifier/slack.go
index f2f5ff8db..2ac9a1fa0 100644
--- a/pkg/notifier/slacknotifier/slack.go
+++ b/pkg/notifier/slacknotifier/slack.go
@@ -14,7 +14,7 @@ import (
 	"github.com/slack-go/slack"
 )
 
-var limiter = rate.NewLimiter(rate.Every(1*time.Second), 1)
+var limiter = rate.NewLimiter(rate.Every(1*time.Second), 3)
 
 type notifyTask struct {
 	Channel string