diff --git a/.github/workflows/coding-standard.yml b/.github/workflows/coding-standard.yml
index d030add..2c2f078 100644
--- a/.github/workflows/coding-standard.yml
+++ b/.github/workflows/coding-standard.yml
@@ -91,3 +91,16 @@ jobs:
             -
                 name: Run PHPStan in /test directory
                 run: ./vendor/bin/phpstan analyze --configuration=./phpstan.neon tests --level=5
+                
+            -   
+                name: Failed build Slack notification
+                uses: rtCamp/action-slack-notify@v2
+                if: ${{ failure() && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master') }}
+                env:
+                    SLACK_CHANNEL: ${{ secrets.FAILED_BUILD_SLACK_CHANNEL }}
+                    SLACK_COLOR: ${{ job.status }}
+                    SLACK_ICON: https://github.com/rtCamp.png?size=48
+                    SLACK_MESSAGE: ':x:'
+                    SLACK_TITLE: Failed build on ${{ github.event.repository.name }} repository
+                    SLACK_USERNAME: ${{ secrets.FAILED_BUILD_SLACK_USERNAME }}
+                    SLACK_WEBHOOK: ${{ secrets.FAILED_BUILD_SLACK_WEBHOOK }}