diff --git a/actions/publish/action.yml b/actions/publish/action.yml
index 385f85b..afa6cd4 100644
--- a/actions/publish/action.yml
+++ b/actions/publish/action.yml
@@ -14,6 +14,7 @@ runs:
   using: "composite"
   steps:
     - id: repo-basename
+      shell: bash
       run: 'echo "value=`basename ${{ github.repository }}`" >> $GITHUB_OUTPUT'
     - uses: actions/checkout@v4
     - name: Setup Pages