diff --git a/bridge/slack/slack.go b/bridge/slack/slack.go
index c39c6082..73366e36 100644
--- a/bridge/slack/slack.go
+++ b/bridge/slack/slack.go
@@ -499,6 +499,7 @@ func (b *Bslack) prepareMessageOptions(msg *config.Message) []slack.MsgOption {
 	params.LinkNames = 1 // replace mentions
 	params.IconURL = config.GetIconURL(msg, b.GetString(iconURLConfig))
 	params.ThreadTimestamp = msg.ParentID
+	params.ReplyBroadcast = true
 	if msg.Avatar != "" {
 		params.IconURL = msg.Avatar
 	}