diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eea4f05..d6d1787 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,5 +19,5 @@ jobs:
           key: ${{ github.ref }}
           path: .cache
       - run: pip install pipenv
-      - run: pipenv install
+      - run: pipenv install --dev
       - run: pipenv run mkdocs gh-deploy --force