diff --git a/doc/sources/conf.py b/doc/sources/conf.py
index 6b2f629cb..3a368248d 100644
--- a/doc/sources/conf.py
+++ b/doc/sources/conf.py
@@ -25,7 +25,7 @@ sys.path.insert(0, os.path.abspath('sphinxext'))
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
     'autodoc', 'sphinx.ext.todo', 'preprocess', 'sphinx.ext.ifconfig',
-    'sphinx.ext.viewcode']
+    'sphinx.ext.viewcode', 'sphinx.ext.mathjax']
 
 # Todo configuration
 todo_include_todos = True