diff --git a/elasticsearch-model/.gitignore b/elasticsearch-model/.gitignore
index d87d4be66..02799166c 100644
--- a/elasticsearch-model/.gitignore
+++ b/elasticsearch-model/.gitignore
@@ -15,3 +15,6 @@ spec/reports
 test/tmp
 test/version_tmp
 tmp
+
+gemfiles/3.gemfile.lock
+gemfiles/4.gemfile.lock
diff --git a/elasticsearch-model/elasticsearch-model.gemspec b/elasticsearch-model/elasticsearch-model.gemspec
index 4174cbcd3..0f2230177 100644
--- a/elasticsearch-model/elasticsearch-model.gemspec
+++ b/elasticsearch-model/elasticsearch-model.gemspec
@@ -32,8 +32,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency "sqlite3"
   s.add_development_dependency "activesupport", "> 3.0"
   s.add_development_dependency "activemodel",   "> 3.0"
-  s.add_development_dependency "activerecord",  "> 3.0"
-  s.add_development_dependency "mongoid",       "> 2.0"
+  s.add_development_dependency "activerecord",  "> 4.0"
+
   s.add_development_dependency "oj"
 
   s.add_development_dependency "shoulda-context"
diff --git a/elasticsearch-model/examples/mongoid_article.rb b/elasticsearch-model/examples/mongoid_article.rb
index 380d35588..fac9fa849 100644
--- a/elasticsearch-model/examples/mongoid_article.rb
+++ b/elasticsearch-model/examples/mongoid_article.rb
@@ -21,14 +21,18 @@
 
 Mongoid.connect_to 'articles'
 
-Elasticsearch::Model.client = Elasticsearch::Client.new log: true
+Elasticsearch::Model.client = Elasticsearch::Client.new host: 'localhost:9250', log: true
 
 class Article
   include Mongoid::Document
   field :id, type: String
   field :title, type: String
   field :published_at, type: DateTime
-  attr_accessible :id, :title, :published_at
+  attr_accessible :id, :title, :published_at if respond_to? :attr_accessible
+
+  def as_indexed_json(options={})
+    as_json(except: [:id, :_id])
+  end
 end
 
 # Extend the model with Elasticsearch support
@@ -45,7 +49,7 @@ class Article
 
 # Index data
 #
-client = Elasticsearch::Client.new log:true
+client = Elasticsearch::Client.new host:'localhost:9250', log:true
 
 client.indices.delete index: 'articles' rescue nil
 client.bulk index: 'articles',
diff --git a/elasticsearch-model/gemfiles/3.gemfile b/elasticsearch-model/gemfiles/3.gemfile
new file mode 100644
index 000000000..43082a833
--- /dev/null
+++ b/elasticsearch-model/gemfiles/3.gemfile
@@ -0,0 +1,11 @@
+# Usage:
+#
+# $ BUNDLE_GEMFILE=./gemfiles/3.gemfile bundle install
+# $ BUNDLE_GEMFILE=./gemfiles/3.gemfile bundle exec rake test:integration
+
+source 'https://rubygems.org'
+
+gem 'activerecord', '~> 3.2'
+gem 'mongoid',      '>= 3.0'
+
+gemspec path: '../'
diff --git a/elasticsearch-model/gemfiles/4.gemfile b/elasticsearch-model/gemfiles/4.gemfile
new file mode 100644
index 000000000..fc32961c3
--- /dev/null
+++ b/elasticsearch-model/gemfiles/4.gemfile
@@ -0,0 +1,11 @@
+# Usage:
+#
+# $ BUNDLE_GEMFILE=./gemfiles/4.gemfile bundle install
+# $ BUNDLE_GEMFILE=./gemfiles/4.gemfile bundle exec rake test:integration
+
+source 'https://rubygems.org'
+
+gem 'activerecord', '~> 4'
+gem 'mongoid',      '~> 4.0.0.alpha1'
+
+gemspec path: '../'
diff --git a/elasticsearch-model/test/integration/active_record_basic_test.rb b/elasticsearch-model/test/integration/active_record_basic_test.rb
index 6ee992b99..162166360 100644
--- a/elasticsearch-model/test/integration/active_record_basic_test.rb
+++ b/elasticsearch-model/test/integration/active_record_basic_test.rb
@@ -1,5 +1,7 @@
 require 'test_helper'
 
+puts "ActiveRecord #{ActiveRecord::VERSION::STRING}", '-'*80
+
 module Elasticsearch
   module Model
     class ActiveRecordBasicIntegrationTest < Elasticsearch::Test::IntegrationTestCase
diff --git a/elasticsearch-model/test/integration/mongoid_basic_test.rb b/elasticsearch-model/test/integration/mongoid_basic_test.rb
index 1e81fb1f9..3d8ccce72 100644
--- a/elasticsearch-model/test/integration/mongoid_basic_test.rb
+++ b/elasticsearch-model/test/integration/mongoid_basic_test.rb
@@ -9,6 +9,7 @@
 end
 
 if ENV["MONGODB_AVAILABLE"]
+  puts "Mongoid #{Mongoid::VERSION}", '-'*80
 
   logger = ::Logger.new(STDERR)
   logger.formatter = lambda { |s, d, p, m| " #{m.ansi(:faint, :cyan)}\n" }
@@ -30,12 +31,16 @@ class ::MongoidArticle
 
           field :id, type: String
           field :title, type: String
-          attr_accessible :title
+          attr_accessible :title if respond_to? :attr_accessible
 
           mapping do
             indexes :title,      type: 'string', analyzer: 'snowball'
             indexes :created_at, type: 'date'
           end
+
+          def as_indexed_json(options={})
+            as_json(except: [:id, :_id])
+          end
         end
 
         context "Mongoid integration" do