diff --git a/.github/workflows/coding_standard.yml b/.github/workflows/coding_standard.yml
index 588de46..b6b8c5a 100644
--- a/.github/workflows/coding_standard.yml
+++ b/.github/workflows/coding_standard.yml
@@ -71,5 +71,19 @@ jobs:
                 name: Run PHPStan
                 run: vendor/bin/phpstan analyse -c phpstan.neon -l 8 src/
 
-            -   name: Run ECS
+            -   
+                name: Run ECS
                 run: vendor/bin/ecs
+                
+            -   
+                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 }}