diff --git a/.github/workflows/notify.yaml b/.github/workflows/notify.yaml
index e98c12285..4a86704b2 100644
--- a/.github/workflows/notify.yaml
+++ b/.github/workflows/notify.yaml
@@ -18,7 +18,7 @@ jobs:
       - name: Build Message with Python
         id: build_message
         run: |
-          echo "MATTERMOST_MESSAGE=$(python -u scripts/build_message.py)" >> $GITHUB_OUTPUT
+          echo "MATTERMOST_MESSAGE='$(python -u scripts/build_message.py)'" >> $GITHUB_OUTPUT
 
       - name: Send notification to Mattermost
         env: