diff --git a/source/conf.py b/source/conf.py
index e011d58..742f616 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -29,4 +29,8 @@ html_static_path = ['_static']
 
 # These paths are either relative to html_static_path
 # or fully qualified paths (eg. https://...)
-html_style = 'css/custom.css'
+#html_style = 'css/custom.css'
+html_css_files = [
+    'css/custom.css',
+]
+