diff --git a/doc/source/conf.py.in b/doc/source/conf.py.in
index 7d8f1c5f3d..d097b0d00c 100644
--- a/doc/source/conf.py.in
+++ b/doc/source/conf.py.in
@@ -35,8 +35,6 @@ extensions = [
     'sphinx.ext.ifconfig',
 ]
 
-import sphinx_rtd_theme
-
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -125,7 +123,7 @@ todo_include_todos = True
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+html_theme = 'bizstyle'
 
 # 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
@@ -134,7 +132,7 @@ html_theme = 'sphinx_rtd_theme'
 # html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+#html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # The name for this set of Sphinx documents.
 # "<project> v<release> documentation" by default.