diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 67b129b..da29abd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,5 +21,6 @@ jobs:
           path: .cache
           restore-keys: |
             mkdocs-material-
-      - run: pip install mkdocs-material 
+      - run: pip install mkdocs-material
+      - run: pip install pillow cairosvg
       - run: mkdocs gh-deploy --force