diff --git a/lib/rocco.rb b/lib/rocco.rb
index ec62b39..467f9ef 100644
--- a/lib/rocco.rb
+++ b/lib/rocco.rb
@@ -216,7 +216,7 @@ class Rocco
   def highlight_webservice(code)
     Net::HTTP.post_form(
       URI.parse('http://pygments.appspot.com/'),
-      {'lang' => @options['language'], 'code' => code}
+      {'lang' => @options[:language], 'code' => code}
     ).body
   end
 end