diff --git a/Rakefile b/Rakefile
index e6c517970..776e3004a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -35,6 +35,8 @@ namespace :bundle do
     sh "bundle install --gemfile #{__current__.join('elasticsearch-model/gemfiles')}/3.0.gemfile"
     puts '-'*80
     sh "bundle install --gemfile #{__current__.join('elasticsearch-model/gemfiles')}/4.0.gemfile"
+    puts '-'*80
+    sh "bundle install --gemfile #{__current__.join('elasticsearch-model/gemfiles')}/5.0.gemfile"
   end
 
   desc "Remove Gemfile.lock in all subprojects"
@@ -45,6 +47,7 @@ namespace :bundle do
     end
     sh "rm -f #{__current__.join('elasticsearch-model/gemfiles')}/3.0.gemfile.lock"
     sh "rm -f #{__current__.join('elasticsearch-model/gemfiles')}/4.0.gemfile.lock"
+    sh "rm -f #{__current__.join('elasticsearch-model/gemfiles')}/5.0.gemfile.lock"
   end
 end
 
diff --git a/elasticsearch-model/.gitignore b/elasticsearch-model/.gitignore
index 3934d7e55..8a8ab4613 100644
--- a/elasticsearch-model/.gitignore
+++ b/elasticsearch-model/.gitignore
@@ -18,3 +18,4 @@ tmp
 
 gemfiles/3.0.gemfile.lock
 gemfiles/4.0.gemfile.lock
+gemfiles/5.0.gemfile.lock
diff --git a/elasticsearch-model/Rakefile b/elasticsearch-model/Rakefile
index 2825f58b0..7f244dd4b 100644
--- a/elasticsearch-model/Rakefile
+++ b/elasticsearch-model/Rakefile
@@ -28,10 +28,11 @@ namespace :test do
     test.test_files = FileList["test/integration/**/*_test.rb"]
   end
 
-  desc "Run integration tests against ActiveModel 3 and 4"
+  desc "Run integration tests against ActiveModel 3, 4 and 5"
   task :integration do
     sh "BUNDLE_GEMFILE='#{File.expand_path('../gemfiles/3.0.gemfile', __FILE__)}' bundle exec rake test:run_integration" unless defined?(RUBY_VERSION) && RUBY_VERSION > '2.2'
     sh "BUNDLE_GEMFILE='#{File.expand_path('../gemfiles/4.0.gemfile', __FILE__)}' bundle exec rake test:run_integration"
+    sh "BUNDLE_GEMFILE='#{File.expand_path('../gemfiles/5.0.gemfile', __FILE__)}' bundle exec rake test:run_integration"
   end
 
   desc "Run unit and integration tests"
diff --git a/elasticsearch-model/elasticsearch-model.gemspec b/elasticsearch-model/elasticsearch-model.gemspec
index cba0808ea..07ecc87b9 100644
--- a/elasticsearch-model/elasticsearch-model.gemspec
+++ b/elasticsearch-model/elasticsearch-model.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "kaminari"
   s.add_development_dependency "will_paginate"
 
-  s.add_development_dependency "minitest", "~> 4.2"
+  s.add_development_dependency "minitest", ">= 4.2"
   s.add_development_dependency "test-unit" if defined?(RUBY_VERSION) && RUBY_VERSION > '2.2'
   s.add_development_dependency "shoulda-context"
   s.add_development_dependency "mocha"
diff --git a/elasticsearch-model/gemfiles/5.0.gemfile b/elasticsearch-model/gemfiles/5.0.gemfile
new file mode 100644
index 000000000..75b8a7ca9
--- /dev/null
+++ b/elasticsearch-model/gemfiles/5.0.gemfile
@@ -0,0 +1,12 @@
+# Usage:
+#
+# $ BUNDLE_GEMFILE=./gemfiles/5.0.gemfile bundle install
+# $ BUNDLE_GEMFILE=./gemfiles/5.0.gemfile bundle exec rake test:integration
+
+source 'https://rubygems.org'
+
+gemspec path: '../'
+
+gem 'activemodel',  '~> 5'
+gem 'activerecord', '~> 5'
+gem 'sqlite3'
diff --git a/elasticsearch-model/lib/elasticsearch/model/adapters/active_record.rb b/elasticsearch-model/lib/elasticsearch/model/adapters/active_record.rb
index 2d9bb5378..9d092dd10 100644
--- a/elasticsearch-model/lib/elasticsearch/model/adapters/active_record.rb
+++ b/elasticsearch-model/lib/elasticsearch/model/adapters/active_record.rb
@@ -26,7 +26,10 @@ def records
             # by redefining `to_a`, unless the user has called `order()`
             #
             sql_records.instance_exec(response.response['hits']['hits']) do |hits|
-              define_singleton_method :to_a do
+              ar_records_method_name = :to_a
+              ar_records_method_name = :records if defined?(::ActiveRecord) && ::ActiveRecord::VERSION::MAJOR >= 5
+
+              define_singleton_method(ar_records_method_name) do
                 if defined?(::ActiveRecord) && ::ActiveRecord::VERSION::MAJOR >= 4
                   self.load
                 else
diff --git a/elasticsearch-model/test/integration/active_record_basic_test.rb b/elasticsearch-model/test/integration/active_record_basic_test.rb
index 3636f98f4..bf030c199 100644
--- a/elasticsearch-model/test/integration/active_record_basic_test.rb
+++ b/elasticsearch-model/test/integration/active_record_basic_test.rb
@@ -100,7 +100,10 @@ def as_indexed_json(options = {})
         end
 
         should "preserve the search results order for records" do
-          response = Article.search('title:code')
+          response = Article.search query: { match: { title: 'code' }}, sort: { clicks: :desc }
+
+          assert_equal response.records[0].clicks, 3
+          assert_equal response.records[1].clicks, 2
 
           response.records.each_with_hit do |r, h|
             assert_equal h._id, r.id.to_s