diff --git a/.github/actions/firebase/action.yml b/.github/actions/firebase/action.yml
index 5190cca..c9b8de1 100644
--- a/.github/actions/firebase/action.yml
+++ b/.github/actions/firebase/action.yml
@@ -16,4 +16,4 @@ runs:
     - name: Copy build/deployment files
       shell: bash
       run: |
-        cp  ${{ github.action_path }}/files/* ${{ inputs.working-directory + '/' + inputs.package-name }}
+        cp  ${{ github.action_path }}/files/* ${{ inputs.working-directory }}/${{ inputs.package-name }}