diff --git a/.github/workflows/build-windows-x86_64.yml b/.github/workflows/build-windows-x86_64.yml
index 7fe02241..d6baba23 100644
--- a/.github/workflows/build-windows-x86_64.yml
+++ b/.github/workflows/build-windows-x86_64.yml
@@ -54,6 +54,7 @@ jobs:
 
       - name: Generate hashed key for cache
         id: cache-key
+        shell: bash
         run: |
           INPUT_HASH=$(echo "${{ inputs.version }}-dependencies-${{ inputs.extensions }}" | sha256sum | awk '{print $1}')
           echo "::set-output name=hash::$INPUT_HASH"