diff --git a/mkdocs.yml b/mkdocs.yml
index df41e3ef7399f752c1c60e60d69f591787df6187..19f3e777eb6a5e54863ab235ceaea662344aab08 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -80,6 +80,7 @@ extra_css:
   # From: https://github.com/g-provost/lightgallery-markdown
   - theme/css/lightgallery.css
   # Define personal extra css
+  - theme/css/extra.css
   # Define colors (all materials colors RGB code)
   - theme/css/colors.css
   # Define fonts