diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c0fb34c..7e387e0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,6 @@ jobs:
         with:
           key: ${{ github.ref }}
           path: .cache
-      - run: pip install mkdocs-material
+      - run: pip install mkdocs-material "mkdocstrings[python]"
       - run: pip install pillow cairosvg
       - run: mkdocs gh-deploy --force