diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 30f7fe0..27adfd6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,4 +26,5 @@ jobs:
                   restore-keys: |
                       mkdocs-material-
             - run: pip install mkdocs-material
+            - run: pip install mkdocs-glightbox
             - run: mkdocs gh-deploy --force