diff --git a/action.yml b/action.yml
index ad1160f..4eb71ba 100644
--- a/action.yml
+++ b/action.yml
@@ -4,6 +4,7 @@ runs:
   using: "composite"
   steps:
     - run: $GITHUB_ACTION_PATH/install.bat
+      shell: bash
 branding:
   icon: 'blue'
   color: 'gray-dark'