diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 02c5bf7..88caef0 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -78,6 +78,7 @@ jobs:
           export PKG_CONFIG_PATH="/usr/local/opt/icu4c/lib/pkgconfig:/opt/homebrew/opt/icu4c/lib/pkgconfig${PKG_CONFIG_PATH+:$PKG_CONFIG_PATH}";
           export PATH="/usr/local/opt/icu4c/bin:/usr/local/opt/icu4c/sbin${PATH+:$PATH}"
           python -m tox r -m build
+        shell: bash
 
       - name: Archive production artifacts
         uses: actions/upload-artifact@v3
diff --git a/.github/workflows/package.yaml b/.github/workflows/package.yaml
index a427410..8f794e5 100644
--- a/.github/workflows/package.yaml
+++ b/.github/workflows/package.yaml
@@ -46,6 +46,7 @@ jobs:
           export PATH="/usr/local/opt/icu4c/bin:/usr/local/opt/icu4c/sbin${PATH+:$PATH}"
           python -m tox r
           python -m tox r -m release
+        shell: bash
         env:
           TWINE_USERNAME: __token__
           TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}