diff --git a/.github/workflows/mend-slack.yml b/.github/workflows/mend-slack.yml
index 4c40164..72f94f2 100644
--- a/.github/workflows/mend-slack.yml
+++ b/.github/workflows/mend-slack.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       - name: Post to Slack
         id: slack
-        uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           channel-id: 'C05NLTMGCJC'
           # For posting a simple plain text message