diff --git a/gemfiles/mongoid_30.gemfile b/gemfiles/mongoid_30.gemfile
index 6f6d185..5c507f7 100644
--- a/gemfiles/mongoid_30.gemfile
+++ b/gemfiles/mongoid_30.gemfile
@@ -5,6 +5,7 @@ gem 'mongoid', '~> 3.0.0'
 gem 'rspec-rails', '>= 2.0'
 gem 'origin'
 gem 'moped'
+gem 'activesupport', '~> 3.2.18'
 
 platforms :rbx do
   gem 'rubysl', '~> 2.0'