diff --git a/config.rb b/config.rb
index 153811b..802a6b3 100644
--- a/config.rb
+++ b/config.rb
@@ -6,7 +6,7 @@ set :relative_links, true
 set :markdown_engine, :redcarpet
 set :markdown, :fenced_code_blocks => true, :smartypants => true, :with_toc_data => true
 
-activate :syntax
+activate :syntax, css_class: "pygments"
 
 activate :directory_indexes