diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 4eded6893..2456f2129 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -10,6 +10,7 @@ runs:
   steps:
     # マスクする
     - name: Mask API Key
+      shell: bash
       run: |
         echo "::add-mask::${{ inputs.apiKey }}"