diff --git a/.github/workflows/fetch-daily.yml b/.github/workflows/fetch-daily.yml
index d67c2e3..74e7bb1 100644
--- a/.github/workflows/fetch-daily.yml
+++ b/.github/workflows/fetch-daily.yml
@@ -40,9 +40,9 @@ jobs:
         id: changes
         run: |
           if git diff --quiet docs/; then
-            echo "has_changes=false" >> $GITHUB_OUTPUT
+            echo "has_changes=false" >> "$GITHUB_OUTPUT"
           else
-            echo "has_changes=true" >> $GITHUB_OUTPUT
+            echo "has_changes=true" >> "$GITHUB_OUTPUT"
           fi
 
       - name: Commit and push changes