diff --git a/action.yml b/action.yml
index 696edff..03c769f 100644
--- a/action.yml
+++ b/action.yml
@@ -10,6 +10,7 @@ runs:
   steps:      
     - name: Archive build output
       run: "tar --dereference --hard-dereference --directory ${{ inputs.directory }} -cvf artifact.tar ."
+      shell: bash
       working-directory: "/workspace"
     - name: Upload artifact
       uses: actions/upload-artifact@main