diff --git a/action.yml b/action.yml
index c0c52f13f..193cb9380 100644
--- a/action.yml
+++ b/action.yml
@@ -11,7 +11,8 @@ inputs:
     default: ${{ github.repository }}
 
 runs:
-  using: "composite"
+  using: composite
+  shell: bash
   steps:
     - name: Checkout
       uses: actions/checkout@v2.3.4