diff --git a/.github/actions/rng/action.yml b/.github/actions/rng/action.yml
index e0c02d31e..2fc2836e0 100644
--- a/.github/actions/rng/action.yml
+++ b/.github/actions/rng/action.yml
@@ -17,6 +17,7 @@ runs:
   steps:
     - name: Generate random
       id: prng
+      shell: bash
       env:
         LENGTH: "${{ inputs.length }}"
       run: |