diff --git a/Gemfile b/Gemfile
index da3b3b4d7..a599613ba 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ unless RUBY_PLATFORM =~ /w32/
   gem 'iconv'
 end
 
-#gem 'certified'
+gem 'certified'
 
 gem 'wechat',path: 'lib/wechat'
 gem 'grack', path:'lib/grack'