diff --git a/tidb-cloud/monitor-alert-slack.md b/tidb-cloud/monitor-alert-slack.md
index a9c109688465a..347f54c4affa5 100644
--- a/tidb-cloud/monitor-alert-slack.md
+++ b/tidb-cloud/monitor-alert-slack.md
@@ -5,7 +5,7 @@ summary: Learn how to monitor your TiDB cluster by getting alert notifications v
 
 # Subscribe via Slack
 
-TiDB Cloud provides you with an easy way to subscribe to alert notifications via [Slack](https://slack.com/), [email](/tidb-cloud/monitor-alert-email.md), and [Zoom](/tidb-cloud/monitor-alert-zoom.md). This document describes how to subscribe to alert notifications via Slack.
+TiDB Cloud provides you with an easy way to subscribe to alert notifications via [Slack](/tidb-cloud/monitor-alert-slack.md), [email](/tidb-cloud/monitor-alert-email.md), [Zoom](/tidb-cloud/monitor-alert-zoom.md), [Flashduty](/tidb-cloud/monitor-alert-flashduty.md), and [PagerDuty](/tidb-cloud/monitor-alert-pagerduty.md). This document describes how to subscribe to alert notifications via Slack.
 
 The following screenshot shows two example alerts.
 
@@ -62,4 +62,4 @@ If you no longer want to receive alert notifications of clusters in your project
 1. In the [TiDB Cloud console](https://tidbcloud.com), switch to your target project using the combo box in the upper-left corner.
 2. In the left navigation pane, click **Project Settings** > **Alert Subscription**.
 3. On the **Alert Subscription** page, locate the row of your target subscriber to be deleted, and then click **...** > **Unsubscribe**.
-4. Click **Unsubscribe** to confirm the unsubscription.
\ No newline at end of file
+4. Click **Unsubscribe** to confirm the unsubscription.