diff --git a/.github/workflows/trigger_new_rss.yml b/.github/workflows/trigger_new_rss.yml
index 794c407..6ebb241 100644
--- a/.github/workflows/trigger_new_rss.yml
+++ b/.github/workflows/trigger_new_rss.yml
@@ -16,7 +16,7 @@ jobs:
       - run: git clone ${{ github.server_url }}/${{ github.repository }}
       - name: latest commit message
         run: |
-          echo LATEST_MESSAGE=$(git log --no-merges -n -1 --pretty=%s) >> $GITHUB_ENV
+          echo LATEST_MESSAGE=$(git log --no-merges -n 1 --pretty=%s) >> $GITHUB_ENV
         working-directory: ${{ github.event.repository.name }}
       - name: check commit message
         run: echo $LATEST_MESSAGE