diff --git a/actions/commit_pr_and_merge/action.yaml b/actions/commit_pr_and_merge/action.yaml
index 9248d06..9b6f179 100644
--- a/actions/commit_pr_and_merge/action.yaml
+++ b/actions/commit_pr_and_merge/action.yaml
@@ -30,6 +30,7 @@ runs:
   steps:
     - name: Check for changes
       id: changes
+      shell: bash
       run: |
         if [[ -n $(git status --porcelain) ]]; then
           echo "changes_exist=true" >> $GITHUB_OUTPUT