diff --git a/pelicanconf.py b/pelicanconf.py
index 1f8cdaf..2c6cf08 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -33,5 +33,6 @@ DEFAULT_PAGINATION = 10
 
 #MARKUP = [ 'asc', 'asciidoc' ]
 MARKUP = ['mdown']
+MD_EXTENSIONS = ['codehilite(css_class=highlight)', 'extra', 'toc']
 # Uncomment following line if you want document-relative URLs when developing
 #RELATIVE_URLS = True