diff --git a/doc/conf.py b/doc/conf.py
index 88708c57d..f67f054dc 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -38,7 +38,6 @@
     'sphinx.ext.doctest',
     'sphinx.ext.intersphinx',
     'sphinx.ext.linkcode',
-    'sphinx.ext.viewcode',
     'numpydoc',
     'sphinx_issues',
     'sphinx_gallery.gen_gallery',