diff --git a/docs/source/conf.py b/docs/source/conf.py
index 886a9c8b..341eba82 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -26,7 +26,8 @@
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc',
+extensions = ['sphinx_rtd_theme',
+              'sphinx.ext.autodoc',
               'sphinx.ext.napoleon',
               'sphinx.ext.intersphinx',]
 
@@ -97,7 +98,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = '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