diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f5b17c87..1e853399 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,5 +18,6 @@ jobs:
         with:
           key: ${{ github.ref }}
           path: .cache
-      - run: pip install mkdocs-material 
+      - run: pip install mkdocs-material
+      - run: pip install pillow cairosvg
       - run: mkdocs gh-deploy --force
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