diff --git a/doc/source/conf.py b/doc/source/conf.py
index a55df76..fd8cbb5 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -91,7 +91,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'nature'
 
 # 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