diff --git a/doc/source/conf.py b/doc/source/conf.py
index 8bac6d3c6..3886c2bb7 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -37,10 +37,8 @@
     'sphinx.ext.intersphinx',
     'sphinx.ext.todo',
     'sphinx.ext.coverage',
-    'sphinx.ext.mathjax',
     'sphinx.ext.ifconfig',
     'sphinx.ext.viewcode',
-    'sphinx.ext.mathbase',
     'sphinxcontrib.bibtex',
     'sphinxcontrib.programoutput',
     'cloud_sptheme.ext.table_styling',