diff --git a/doc/source/conf.py b/doc/source/conf.py
index 1e82dfca87d17..6840f76866d2c 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -46,7 +46,7 @@
               'ipython_sphinxext.ipython_console_highlighting',
               'sphinx.ext.intersphinx',
               'sphinx.ext.coverage',
-              'sphinx.ext.pngmath',
+              'sphinx.ext.mathjax',
               'sphinx.ext.ifconfig',
               'sphinx.ext.linkcode',
               ]