diff --git a/doc/source/conf.py b/doc/source/conf.py
index fbbba0074..cfcbd563b 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -6,7 +6,6 @@
 import sys
 from os.path import abspath, dirname, join, normpath
 import shlex
-import sphinx_rtd_theme
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -193,10 +192,6 @@ html_sidebars = {
          ]
 }
 
-html_theme = "sphinx_rtd_theme"
-
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-
 html_static_path = ['.static']
 
 html_theme_options = {
