diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9ea1161..b8c4e04 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -209,7 +209,9 @@ jobs:
 
   notify_diffs:
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    if: |
+      (github.event_name == 'push' && github.ref == 'refs/heads/master') ||
+      (github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true)
     needs: parse
     steps:
       - name: Checkout repository
@@ -231,10 +233,7 @@ jobs:
           TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
           TELEGRAM_CHAT_ID: ${{ secrets.TELEGRAM_CHAT_ID_UPDATE }}
         run: |
-          LAST_COMMIT_MESSAGE=$(git log -1 --pretty=%B)
-          if [[ "$LAST_COMMIT_MESSAGE" == Merge* ]]; then
-            python3 update_diffs.py --token ${{ secrets.TELEGRAM_BOT_TOKEN }} --chat_id ${{ secrets.TELEGRAM_CHAT_ID_UPDATE }} --base_commit HEAD~1
-          fi
+          python3 update_diffs.py --token ${{ secrets.TELEGRAM_BOT_TOKEN }} --chat_id ${{ secrets.TELEGRAM_CHAT_ID_UPDATE }} --base_commit HEAD~1
 
 
   backup: