diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c0c8cfd..8b5f396 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
     needs: [rspec, static_type_check]
     if: ${{ failure() && github.ref == 'refs/heads/main' }}
     steps:
-      - uses: slackapi/slack-github-action@b0fa283ad8fea605de13dc3f449259339835fc52 # v2.1.0
+      - uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook