diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d560f4c..ceb6598 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,6 +25,6 @@ jobs:
           path: .cache
           restore-keys: |
             mkdocs-material-
-      - run: pip install mkdocs-material 
+      - run: pip install mkdocs-material mkdocs-glightbox
       - run: mkdocs gh-deploy --force
         working-directory: documentation