diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 11e2f24..2364d8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,4 +23,5 @@ jobs:
       - run: pip install mkdocs-material
       - run: pip install pillow cairosvg
       - run: pip install mkdocs-git-revision-date-localized-plugin
+      - run: pip install mkdocs-glightbox
       - run: mkdocs gh-deploy --force