diff --git a/Gemfile b/Gemfile
index 3dd2f20..46ed377 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,8 @@ source "http://rubygems.org"
 
 gemspec
 
-# Mocking library
-gem 'rspec-mocks'
+gem 'yajl-ruby'
+
+group :test do
+  gem 'rspec-mocks'
+end
diff --git a/Gemfile.lock b/Gemfile.lock
index 881f7c6..707de63 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,6 +3,7 @@ PATH
   specs:
     rabl-rails (0.1.0)
       activesupport (~> 3.0)
+      railties (~> 3.0)
 
 GEM
   remote: http://rubygems.org/
@@ -55,6 +56,7 @@ GEM
     sqlite3 (1.3.6)
     thor (0.15.4)
     tilt (1.3.3)
+    yajl-ruby (1.1.0)
 
 PLATFORMS
   ruby
@@ -62,6 +64,6 @@ PLATFORMS
 DEPENDENCIES
   actionpack (~> 3.0)
   rabl-rails!
-  railties (~> 3.0)
   rspec-mocks
   sqlite3
+  yajl-ruby
diff --git a/lib/rabl-rails.rb b/lib/rabl-rails.rb
index 289746b..47eee41 100644
--- a/lib/rabl-rails.rb
+++ b/lib/rabl-rails.rb
@@ -14,22 +14,29 @@ require 'rabl-rails/library'
 require 'rabl-rails/handler'
 require 'rabl-rails/railtie'
 
-
+require 'multi_json'
 
 module RablRails
-  extend self
-
   mattr_accessor :cache_templates
   @@cache_templates = true
   
   mattr_accessor :include_json_root
   @@include_json_root = true
 
-  def configure
+  mattr_accessor :json_engine
+  @@json_engine = :yajl
+
+  def self.configure
     yield self
+    post_configure
   end
 
-  def cache_templates?
+  def self.cache_templates?
     ActionController::Base.perform_caching && @@cache_templates
   end
+
+  private
+  def self.post_configure
+    MultiJson.engine = self.json_engine 
+  end
 end
diff --git a/lib/rabl-rails/renderers/json.rb b/lib/rabl-rails/renderers/json.rb
index 29f528c..ef42fb5 100644
--- a/lib/rabl-rails/renderers/json.rb
+++ b/lib/rabl-rails/renderers/json.rb
@@ -3,7 +3,7 @@ module RablRails
     class JSON < Base
       def format_output(hash)
         hash = { options[:root_name] => hash } if options[:root_name] && RablRails.include_json_root
-        ActiveSupport::JSON.encode(hash)
+        MultiJson.encode(hash)
       end
     end
   end
diff --git a/rabl-rails.gemspec b/rabl-rails.gemspec
index 4707712..5fd4a42 100644
--- a/rabl-rails.gemspec
+++ b/rabl-rails.gemspec
@@ -16,8 +16,8 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_dependency "activesupport", "~> 3.0"
+  s.add_dependency "railties", "~> 3.0"
 
   s.add_development_dependency "sqlite3"
-  s.add_development_dependency "railties", "~> 3.0"
   s.add_development_dependency "actionpack", "~> 3.0"
 end