diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8403558..e2e62f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -83,6 +83,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: recursive
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
@@ -90,7 +92,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        pip install --upgrade setuptools wheel twine
     - name: Download artifacts from build jobs
       uses: actions/download-artifact@v2
       with: