diff --git a/mkdocs-source.yml b/mkdocs-source.yml
index 1550310..c3e4ee1 100644
--- a/mkdocs-source.yml
+++ b/mkdocs-source.yml
@@ -36,21 +36,30 @@ i18n:
 
 extra_css:
   - css/extra.css
+  - ../docs.extra/css/extra.css
 
 extra_javascript:
   - js/extra.js
+  - ../docs.extra/js/extra.js
+  - ../docs.extra/js/mathjax.js
+  - ../docs.extra/js/polyfill.min.js
+  - ../docs.extra/js/tex-mml-chtml.js
 
 # author:
 #   github: 'glenux'
 #   twitter: 'glenux'
 
 # Extensions
+# * https://squidfunk.github.io/mkdocs-material/reference/mathjax/
 markdown_extensions:
   - footnotes
   - admonition
   - toc:
       permalink: '#'
 
+  # https://squidfunk.github.io/mkdocs-material/reference/mathjax/
+  - pymdownx.arithmatex:
+      generic: true
   # https://squidfunk.github.io/mkdocs-material/reference/code-blocks/
   - pymdownx.highlight:
       anchor_linenums: false