diff --git a/.github/workflows/pypi_deploy.yml b/.github/workflows/pypi_deploy.yml
index 9779c18ef..611188648 100644
--- a/.github/workflows/pypi_deploy.yml
+++ b/.github/workflows/pypi_deploy.yml
@@ -13,6 +13,8 @@ jobs:
       runs-on: ubuntu-latest
       steps:
       - uses: actions/checkout@master
+        with:
+          submodules: recursive
       - name: Set up Python 3.8
         uses: actions/setup-python@v1
         with: