diff --git a/doc/source/conf.py b/doc/source/conf.py
index fd32819f5..4cb38701c 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -116,3 +116,8 @@ html_sidebars = {
     '**':       ['localtoc.html', 'relations.html',
                  'searchbox.html', 'sourcelink.html']
 }
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']