diff --git a/.travis.yml b/.travis.yml
index 0d16897..de50b22 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,5 +2,8 @@ language: ruby
 cache: bundler
 rvm:
   - 2.2.3
+env:
+  - RAILS=4
+  - RAILS=5
 notifications:
   email: false
diff --git a/Gemfile b/Gemfile
index ca27cba..d88e257 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,13 @@
 source 'https://rubygems.org'
 gemspec
 
+case ENV['RAILS']
+when '5'
+  gem 'actionpack', '5.0.0.rc1'
+when '4'
+  gem 'actionpack', '~> 4.2'
+end
+
 group :development do
   gem 'sdoc', '~> 0.4.1'
   gem 'pry', '~> 0.10.1'
diff --git a/lib/telegram/bot/middleware.rb b/lib/telegram/bot/middleware.rb
index 087069c..70bbd30 100644
--- a/lib/telegram/bot/middleware.rb
+++ b/lib/telegram/bot/middleware.rb
@@ -1,6 +1,8 @@
 require 'active_support/concern'
+require 'active_support/core_ext/hash/indifferent_access'
+require 'active_support/json'
 require 'action_dispatch/http/mime_type'
-require 'action_dispatch/middleware/params_parser'
+require 'action_dispatch/http/request'
 
 module Telegram
   module Bot
@@ -13,7 +15,8 @@ module Telegram
       end
 
       def call(env)
-        update = env['action_dispatch.request.request_parameters']
+        request = ActionDispatch::Request.new(env)
+        update = request.request_parameters
         controller.dispatch(bot, update)
         [200, {}, ['']]
       end
diff --git a/lib/telegram/bot/updates_controller.rb b/lib/telegram/bot/updates_controller.rb
index 571b701..ae7528d 100644
--- a/lib/telegram/bot/updates_controller.rb
+++ b/lib/telegram/bot/updates_controller.rb
@@ -63,7 +63,7 @@ module Telegram
 
       include AbstractController::Callbacks
       # Redefine callbacks with default terminator.
-      if ActiveSupport.gem_version >= Gem::Version.new('5')
+      if ActiveSupport::VERSION::MAJOR >= 5
         define_callbacks  :process_action,
                           skip_after_callbacks_if_terminated: true
       else
diff --git a/spec/telegram/bot/middleware_spec.rb b/spec/telegram/bot/middleware_spec.rb
index ab4b605..dff57d6 100644
--- a/spec/telegram/bot/middleware_spec.rb
+++ b/spec/telegram/bot/middleware_spec.rb
@@ -1,3 +1,5 @@
+require 'rack/mock'
+
 RSpec.describe Telegram::Bot::Middleware do
   let(:instance) { described_class.new bot, controller }
   let(:bot) { double(:bot) }
@@ -6,10 +8,25 @@ RSpec.describe Telegram::Bot::Middleware do
   describe '#call' do
     subject { instance.call(env) }
     let(:env) { {'action_dispatch.request.request_parameters' => json_body} }
-    let(:json_body) { double(:json_body) }
+    let(:update) { {'message' => {'id' => 1}} }
+    let(:env) do
+      Rack::MockRequest.env_for('/',
+        method: :post,
+        input:  JSON.dump(update),
+        'CONTENT_TYPE' => 'application/json',
+      )
+    end
+
+    require 'action_pack/version'
+    if ActionPack::VERSION::MAJOR < 5
+      # Before Rails 5, params are parsed in middleware.
+      # In Rails 5, they are parsed in Request#request_parameters.
+      require 'action_dispatch/middleware/params_parser'
+      let(:instance) { ActionDispatch::ParamsParser.new(super()) }
+    end
 
     it 'calls dispatch on controller' do
-      expect(controller).to receive(:dispatch).with(bot, json_body)
+      expect(controller).to receive(:dispatch).with(bot, update)
       subject
     end
 
diff --git a/spec/telegram/bot/updates_controller_spec.rb b/spec/telegram/bot/updates_controller_spec.rb
index f498efd..04e6a5c 100644
--- a/spec/telegram/bot/updates_controller_spec.rb
+++ b/spec/telegram/bot/updates_controller_spec.rb
@@ -225,12 +225,12 @@ RSpec.describe Telegram::Bot::UpdatesController do
       it { should change(controller, :acted).to true }
       its(:call) { should eq [nil, nil, args] }
 
-      context 'when callback returns false' do
+      context 'when callback halts chain' do
         before do
           controller_class.prepend(Module.new do
             def hook
               super
-              false
+              ActiveSupport::VERSION::MAJOR >= 5 ? throw(:abort) : false
             end
           end)
         end