diff --git a/.github/workflows/backup.yml b/.github/workflows/backup.yml
index ce9ff00b..4e8ff217 100644
--- a/.github/workflows/backup.yml
+++ b/.github/workflows/backup.yml
@@ -26,10 +26,9 @@ jobs:
       uses: actions/upload-artifact@v2
       with:
         name: backup
-        path: backup/main_backup_$(date +"%Y%m%d").tar.gz
+        path: backup/main_backup_$(bash -c 'echo $(date +"%Y%m%d").tar.gz')
 
     - name: Set up Git
       run: |
         git config --local user.email "miaogongzi0227@gmail.com"
         git config --local user.name "mgz0227"
-