diff --git a/Gemfile b/Gemfile
index e70beea..da90ac6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,6 +4,7 @@ gemspec
 
 ## Uncomment the following lines to develop against edge refinery
 gem 'refinerycms', :git => 'git://github.com/resolve/refinerycms.git'
+gem 'awesome_nested_set', :git => 'git://github.com/collectiveidea/awesome_nested_set.git'
 
 group :development, :test do
   require 'rbconfig'