diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index 155732e..11ba1d2 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -12,6 +12,9 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+    defaults:
+      run:
+        shell: bash
     steps:
     - uses: actions/setup-python@v1
       with: