Gemfile in mongoid-history-0.1.2 vs Gemfile in mongoid-history-0.1.3

@@ -1,8 +1,8 @@
 source "http://rubygems.org"
 
 gem 'easy_diff'
-gem 'mongoid', '~> 2.0.2'
+gem 'mongoid', '>= 2.0.2'
 
 group :development do
   gem "rspec", "~> 2.3.0"
   gem "yard", "~> 0.6.0"
   gem "bundler", "~> 1.0.0"