diff -up mpmath-1.0.0/doc/source/conf.py.sphinx mpmath-1.0.0/doc/source/conf.py
--- mpmath-1.0.0/doc/source/conf.py.sphinx	2017-09-27 16:59:02.000000000 +0200
+++ mpmath-1.0.0/doc/source/conf.py	2018-05-05 12:03:22.313112845 +0200
@@ -76,7 +76,7 @@ pygments_style = 'sphinx'
 # -----------------------
 
 # The "theme" that the HTML output should use.
-html_theme = 'classic'
+html_theme = 'traditional'
 
 # 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,