diff --git a/readme.md b/readme.md
index c504a07..6dddc84 100644
--- a/readme.md
+++ b/readme.md
@@ -16,7 +16,7 @@ This gem gives every ActiveRecord::Base object the possibility to do a deep clon
 - Add deep_cloneable to your Gemfile:
 
 ```ruby
-gem 'deep_cloneable', '~> 3.0.0'
+gem 'deep_cloneable', '~> 3.1.0'
 ```
 
 ## Upgrade details