diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index f45a5c0..5d0d109 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -11,5 +11,5 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.x
-      - run: pip install mkdocs python-markdown-math
+      - run: pip install mkdocs python-markdown-math mkdocs-bootswatch
       - run: mkdocs gh-deploy --force --clean --verbose