diff --git a/.github/workflows/Preview.yml b/.github/workflows/Preview.yml
index b0e3834d..8527359f 100644
--- a/.github/workflows/Preview.yml
+++ b/.github/workflows/Preview.yml
@@ -69,6 +69,7 @@ jobs:
           p12-password: ${{ secrets.APPLE_CERT_PASSWORD }}
 
       - name: Set commit count
+        shell: bash
         run: |
           commit_count=$(git rev-list --count HEAD)
           echo "COMMIT_COUNT=$commit_count" >> $GITHUB_ENV