diff --git a/.github/workflows/dependabot-auto-merge.yaml b/.github/workflows/dependabot-auto-merge.yaml
index efa4115..2f8d544 100644
--- a/.github/workflows/dependabot-auto-merge.yaml
+++ b/.github/workflows/dependabot-auto-merge.yaml
@@ -68,7 +68,7 @@ jobs:
 
       - name: Notify Slack of manual review required
         if: github.event.action == 'opened' && steps.metadata.outputs.update-type != 'version-update:semver-patch' && steps.metadata.outputs.update-type != 'version-update:semver-minor'
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           webhook: ${{ secrets.DEPENDABOT_SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index b538a52..cae5eaf 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -321,7 +321,7 @@ jobs:
     if: ${{ always() && github.repository == 'NHSDigital/mesh-sandbox' && github.actor== 'dependabot[bot]' && contains(needs.*.result, 'failure') }}
     steps:
       - name: Slack Notification
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           webhook: ${{ secrets.DEPENDABOT_SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook