diff --git a/mkdocs-readthedocs.yml b/mkdocs-readthedocs.yml
index c669882e..0deb0c5f 100644
--- a/mkdocs-readthedocs.yml
+++ b/mkdocs-readthedocs.yml
@@ -37,6 +37,7 @@ markdown_extensions:
       custom_checkbox: true
   - pymdownx.tabbed
   - pymdownx.tilde
+  - codehilite
   - footnotes 
   #- sphinx_search.extension
   - toc: