diff --git a/docs/conf.py b/docs/conf.py
index bce4a04babec891c2e3576f583b537872c8810ea..d08fc1ea6b460d3340481f3f825fe5d1f9565237 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -101,7 +101,7 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'classic'
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the