diff --git a/book/_config.yml b/book/_config.yml
index 16a68fb..e6fb56c 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -23,6 +23,7 @@ sphinx:
   - download_link_replacer
   - jupyterbook_patches
   - teachbooks_sphinx_grasple
+  - sphinx_image_inverter
   config:
     html_js_files:
     - https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.4/require.min.js
diff --git a/requirements.txt b/requirements.txt
index 7251625..0a63bae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ jupyterlite-sphinx
 jupyterbook_patches
 download_link_replacer
 teachbooks-sphinx-grasple
+sphinx-image-inverter
 
 
 --extra-index-url https://gitlab.tudelft.nl/api/v4/projects/11239/packages/pypi/simple