diff --git a/docs/conf.py b/docs/conf.py
index 3d6e322..e84a083 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -117,7 +117,11 @@ 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 = 'alabaster'
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+if on_rtd:
+    html_theme = 'default'
+else:
+    html_theme = 'alabaster'
 
 # 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