diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3581518..3f9b421 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pipenv --upgrade-strategy=only-if-needed
-          pipenv sync
+          pipenv sync --dev
       - name: Run test
         run: make test
       - name: Run codecov