diff --git a/plugins/pygments_code.rb b/plugins/pygments_code.rb
index debeae1..87d3cd6 100644
--- a/plugins/pygments_code.rb
+++ b/plugins/pygments_code.rb
@@ -23,8 +23,8 @@ module HighlightCode
       else
         begin
           highlighted_code = Pygments.highlight(code, :lexer => lang, :formatter => 'html', :options => {:encoding => 'utf-8'})
-        rescue Exception => e
-          highlighted_code = Pygments.highlight(code, :lexer => 'text', :formatter => 'html', :options => {:encoding => 'utf-8'})
+        rescue MentosError
+          raise "Pygments can't parse unknown language: #{lang}."
         end
         File.open(path, 'w') {|f| f.print(highlighted_code) }
       end