README.md in wxianfeng_simple_captcha-0.4.0 vs README.md in wxianfeng_simple_captcha-0.5.0

@@ -20,10 +20,10 @@
 
     gem 'wxianfeng_simple_captcha', '0.2.0', require: 'simple_captcha' 
   
   Rails >=4.0
   
-    gem 'wxianfeng_simple_captcha', '0.4.0', require: 'simple_captcha'
+    gem 'wxianfeng_simple_captcha', '0.5.0', require: 'simple_captcha'
 
 ## Setup
 
     rails generate simple_captcha 
     rake db:migrate