diff --git a/.rubocop.yml b/.rubocop.yml
index 2ee0120..fb802f8 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,24 +1,11 @@
 AllCops:
   Include:
-    - Rakefile
-    - Gemfile
+    - 'Gemfile'
   Exclude:
-    - script/**/*
-    - vendor/**/*
-    - bin/**/*
-LineLength:
-  Enabled: false
-MethodLength:
-  Enabled: false
-ClassLength:
-  Enabled: false
+    - 'script/**/*'
+    - 'vendor/**/*'
+    - 'bin/**/*'
 Documentation:
   Enabled: false
-Encoding:
+ClassAndModuleChildren:
   Enabled: false
-Blocks:
-  Enabled: false
-AlignParameters:
-  Enabled: false
-HashSyntax:
-  EnforcedStyle: ruby19
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 5f36108..c3e0bfc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 language: ruby
+sudo: false
 cache: bundler
 bundler_args: --without development
 rvm:
@@ -10,6 +11,7 @@ rvm:
   - 2.0.0
   - 1.9.3
   - rbx-2
+before_script: bundle update
 matrix:
   fast_finish: true
   allow_failures:
@@ -21,4 +23,4 @@ matrix:
 notifications:
   email: false
 env:
-  - CODECLIMATE_REPO_TOKEN=5eee8e8624962f963a52a1d2313dc7407e3b8006291e3704346c786642cc073b 
\ No newline at end of file
+  - CODECLIMATE_REPO_TOKEN=5eee8e8624962f963a52a1d2313dc7407e3b8006291e3704346c786642cc073b 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 48f652d..3ac195b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,12 @@
-master
-===
+Next Release
+============
+* Your contribution here.
 
-1.0.0
-===
+2.0.0-alpha (02/08/2015)
+==================
+* [Fixing compatibility issues with middleman v4.0.0.beta.1](https://github.com/middleman-contrib/middleman-deploy/pull/87) - [@emilioforrer](https://github.com/emilioforrer).
 
-* Respect user details of git repo. #70
-* Prevent bad commits deploying. (git) #77
+1.0.0 (16/07/2014)
+==================
+* [Respect user details of git repo](https://github.com/middleman-contrib/middleman-deploy/pull/70) - [@Gee-Bee](https://github.com/gee-bee).
+* [Prevent bad commits deploying](https://github.com/middleman-contrib/middleman-deploy/pull/77) - [@karlfreeman](https://github.com/mconnell).
diff --git a/README.md b/README.md
index 6ddd1e4..17ca28f 100644
--- a/README.md
+++ b/README.md
@@ -26,9 +26,9 @@ following to `config.rb`:
 
 ```ruby
 activate :deploy do |deploy|
-  deploy.method = :rsync
-  deploy.host   = 'www.example.com'
-  deploy.path   = '/srv/www/site'
+  deploy.deploy_method = :rsync
+  deploy.host          = 'www.example.com'
+  deploy.path          = '/srv/www/site'
   # Optional Settings
   # deploy.user  = 'tvaughan' # no default
   # deploy.port  = 5309 # ssh port, default: 22
@@ -44,7 +44,7 @@ following to `config.rb`:
 
 ```ruby
 activate :deploy do |deploy|
-  deploy.method = :git
+  deploy.deploy_method = :git
   # Optional Settings
   # deploy.remote   = 'custom-remote' # remote name or git url, default: origin
   # deploy.branch   = 'custom-branch' # default: gh-pages
@@ -70,11 +70,11 @@ Activate the extension by adding the following to `config.rb`:
 
 ```ruby
 activate :deploy do |deploy|
-  deploy.method   = :ftp
-  deploy.host     = 'ftp.example.com'
-  deploy.path     = '/srv/www/site'
-  deploy.user     = 'tvaughan'
-  deploy.password = 'secret'
+  deploy.deploy_method   = :ftp
+  deploy.host            = 'ftp.example.com'
+  deploy.path            = '/srv/www/site'
+  deploy.user            = 'tvaughan'
+  deploy.password        = 'secret'
 end
 ```
 
@@ -84,10 +84,10 @@ Activate the extension by adding the following to `config.rb`:
 
 ```ruby
 activate :deploy do |deploy|
-  deploy.method   = :sftp
-  deploy.host     = 'sftp.example.com'
-  deploy.port     = 22
-  deploy.path     = '/srv/www/site'
+  deploy.deploy_method   = :sftp
+  deploy.host            = 'sftp.example.com'
+  deploy.port            = 22
+  deploy.path            = '/srv/www/site'
   # Optional Settings
   # deploy.user     = 'tvaughan' # no default
   # deploy.password = 'secret' # no default
@@ -115,15 +115,15 @@ Deploy your site to more than one configuration using environment variables.
 case ENV['TARGET'].to_s.downcase
 when 'production'
   activate :deploy do |deploy|
-    deploy.method   = :rsync
-    deploy.host     = 'www.example.com'
-    deploy.path     = '/srv/www/production-site'
+    deploy.deploy_method   = :rsync
+    deploy.host            = 'www.example.com'
+    deploy.path            = '/srv/www/production-site'
   end
 else
   activate :deploy do |deploy|
-    deploy.method   = :rsync
-    deploy.host     = 'staging.example.com'
-    deploy.path     = '/srv/www/staging-site'
+    deploy.deploy_method   = :rsync
+    deploy.host            = 'staging.example.com'
+    deploy.path            = '/srv/www/staging-site'
   end
 end
 ```
diff --git a/lib/middleman-deploy.rb b/lib/middleman-deploy.rb
index 796f4ca..124cd48 100644
--- a/lib/middleman-deploy.rb
+++ b/lib/middleman-deploy.rb
@@ -4,5 +4,5 @@ require 'middleman-deploy/commands'
 
 ::Middleman::Extensions.register(:deploy) do
   require 'middleman-deploy/extension'
-  ::Middleman::Deploy
+  ::Middleman::Deploy::Extension
 end
diff --git a/lib/middleman-deploy/commands.rb b/lib/middleman-deploy/commands.rb
index 345615a..c781949 100644
--- a/lib/middleman-deploy/commands.rb
+++ b/lib/middleman-deploy/commands.rb
@@ -1,5 +1,5 @@
 require 'middleman-core/cli'
-
+require 'middleman-core/rack' if Middleman::VERSION.to_i > 3
 require 'middleman-deploy/pkg-info'
 require 'middleman-deploy/extension'
 require 'middleman-deploy/methods'
@@ -8,24 +8,52 @@ require 'middleman-deploy/strategies'
 module Middleman
   module Cli
     # This class provides a "deploy" command for the middleman CLI.
-    class Deploy < Thor
+    class Deploy < Thor::Group
       include Thor::Actions
 
       check_unknown_options!
 
       namespace :deploy
 
+      class_option :environment,
+                 aliases: '-e',
+                 default: ENV['MM_ENV'] || ENV['RACK_ENV'] || 'production',
+                 desc: 'The environment Middleman will run under'
+
+      class_option :verbose,
+                   type: :boolean,
+                   default: false,
+                   desc: 'Print debug messages'
+
+      class_option :instrument,
+                   type: :string,
+                   default: false,
+                   desc: 'Print instrument messages'
+
+      class_option :build_before,
+        type: :boolean,
+        aliases: '-b',
+        desc: 'Run `middleman build` before the deploy step'
+
+      def self.subcommand_help(_options)
+        # TODO
+      end
+
       # Tell Thor to exit with a nonzero exit code on failure
       def self.exit_on_failure?
         true
       end
 
-      desc 'deploy [options]', Middleman::Deploy::TAGLINE
-      method_option 'build_before',
-        type: :boolean,
-        aliases: '-b',
-        desc: 'Run `middleman build` before the deploy step'
       def deploy
+        env = options['environment'] ? :production : options['environment'].to_s.to_sym
+        verbose = options['verbose'] ? 0 : 1
+        instrument = options['instrument']
+
+        @app = ::Middleman::Application.new do
+          config[:mode] = :build
+          config[:environment] = env
+          ::Middleman::Logger.singleton(verbose, instrument)
+        end
         build_before(options)
         process
       end
@@ -33,24 +61,23 @@ module Middleman
       protected
 
       def build_before(options = {})
-        build_enabled = options.fetch('build_before', self.deploy_options.build_before)
+        build_enabled = options.fetch('build_before', deploy_options.build_before)
 
         if build_enabled
           # http://forum.middlemanapp.com/t/problem-with-the-build-task-in-an-extension
-          run('middleman build') || exit(1)
+          run("middleman build -e #{options['environment']}") || exit(1)
         end
       end
 
       def print_usage_and_die(message)
-        raise Error, "ERROR: #{message}\n#{Middleman::Deploy::README}"
+        fail StandardError, "ERROR: #{message}\n#{Middleman::Deploy::README}"
       end
 
       def process
-        server_instance   = ::Middleman::Application.server.inst
-
-        camelized_method  = self.deploy_options.method.to_s.split('_').map { |word| word.capitalize}.join
+        server_instance   = @app
+        camelized_method  = deploy_options.deploy_method.to_s.split('_').map(&:capitalize).join
         method_class_name = "Middleman::Deploy::Methods::#{camelized_method}"
-        method_instance   = method_class_name.constantize.new(server_instance, self.deploy_options)
+        method_instance   = method_class_name.constantize.new(server_instance, deploy_options)
 
         method_instance.process
       end
@@ -59,19 +86,19 @@ module Middleman
         options = nil
 
         begin
-          options = ::Middleman::Application.server.inst.options
+          options = ::Middleman::Deploy.options
         rescue NoMethodError
           print_usage_and_die 'You need to activate the deploy extension in config.rb.'
         end
 
-        unless options.method
+        unless options.deploy_method
           print_usage_and_die 'The deploy extension requires you to set a method.'
         end
 
-        case options.method
+        case options.deploy_method
         when :rsync, :sftp
           unless options.host && options.path
-            print_usage_and_die "The #{options.method} method requires host and path to be set."
+            print_usage_and_die "The #{options.deploy_method} method requires host and path to be set."
           end
         when :ftp
           unless options.host && options.user && options.password && options.path
@@ -83,6 +110,9 @@ module Middleman
       end
     end
 
+    # Add to CLI
+    Base.register(Middleman::Cli::Deploy, 'deploy', 'deploy [options]', Middleman::Deploy::TAGLINE)
+
     # Alias "d" to "deploy"
     Base.map('d' => 'deploy')
   end
diff --git a/lib/middleman-deploy/extension.rb b/lib/middleman-deploy/extension.rb
index 8ad1e16..b7f59cb 100644
--- a/lib/middleman-deploy/extension.rb
+++ b/lib/middleman-deploy/extension.rb
@@ -4,15 +4,32 @@ require 'middleman-core'
 # Extension namespace
 module Middleman
   module Deploy
-    class Options < Struct.new(:method, :host, :port, :user, :password, :path, :clean, :remote, :branch, :strategy, :build_before, :flags, :commit_message); end
+    @options
 
     class << self
-      def options
-        @@options
-      end
+      attr_reader :options
+
+      attr_writer :options
+    end
+
+    class Extension < Extension
+      option :deploy_method, nil
+      option :host, nil
+      option :port, nil
+      option :user, nil
+      option :password, nil
+      option :path, nil
+      option :clean, nil
+      option :remote, nil
+      option :branch, nil
+      option :strategy, nil
+      option :build_before, nil
+      option :flags, nil
+      option :commit_message, nil
+
+      def initialize(app, options_hash = {}, &block)
+        super
 
-      def registered(app, options_hash = {}, &block)
-        options = Options.new(options_hash)
         yield options if block_given?
 
         # Default options for the rsync method.
@@ -23,21 +40,13 @@ module Middleman
         options.remote ||= 'origin'
         options.branch ||= 'gh-pages'
         options.strategy ||= :force_push
-        options.commit_message  ||= nil
+        options.commit_message ||= nil
 
         options.build_before ||= false
-
-        @@options = options
-
-        app.send :include, Helpers
       end
 
-      alias_method :included, :registered
-    end
-
-    module Helpers
-      def options
-        ::Middleman::Deploy.options
+      def after_configuration
+        ::Middleman::Deploy.options = options
       end
     end
   end
diff --git a/lib/middleman-deploy/methods/base.rb b/lib/middleman-deploy/methods/base.rb
index b8e7627..e4e2aae 100644
--- a/lib/middleman-deploy/methods/base.rb
+++ b/lib/middleman-deploy/methods/base.rb
@@ -9,8 +9,12 @@ module Middleman
           @server_instance  = server_instance
         end
 
+        def build_dir
+          server_instance.config.setting(:build_dir).value
+        end
+
         def process
-          raise NotImplementedError
+          fail NotImplementedError
         end
       end
     end
diff --git a/lib/middleman-deploy/methods/ftp.rb b/lib/middleman-deploy/methods/ftp.rb
index a930e83..619abe2 100644
--- a/lib/middleman-deploy/methods/ftp.rb
+++ b/lib/middleman-deploy/methods/ftp.rb
@@ -18,11 +18,11 @@ module Middleman
         end
 
         def process
-          puts "## Deploying via ftp to #{self.user}@#{self.host}:#{self.path}"
+          puts "## Deploying via ftp to #{user}@#{host}:#{path}"
 
           ftp = open_connection
 
-          Dir.chdir(self.server_instance.build_dir) do
+          Dir.chdir(build_dir) do
             filtered_files.each do |filename|
               if File.directory?(filename)
                 upload_directory(ftp, filename)
@@ -57,9 +57,9 @@ module Middleman
         end
 
         def open_connection
-          ftp = Net::FTP.new(self.host)
-          ftp.login(self.user, self.pass)
-          ftp.chdir(self.path)
+          ftp = Net::FTP.new(host)
+          ftp.login(user, pass)
+          ftp.chdir(path)
           ftp.passive = true
 
           ftp
@@ -76,11 +76,9 @@ module Middleman
         end
 
         def upload_directory(ftp, filename)
-          begin
-            ftp.mkdir(filename)
-            puts "Created directory #{filename}"
-          rescue
-          end
+          ftp.mkdir(filename)
+          puts "Created directory #{filename}"
+        rescue
         end
       end
     end
diff --git a/lib/middleman-deploy/methods/git.rb b/lib/middleman-deploy/methods/git.rb
index 990797e..82bc2cc 100644
--- a/lib/middleman-deploy/methods/git.rb
+++ b/lib/middleman-deploy/methods/git.rb
@@ -3,11 +3,11 @@ module Middleman
     module Methods
       class Git < Base
         def process
-          puts "## Deploying via git to remote=\"#{self.options.remote}\" and branch=\"#{self.options.branch}\""
+          puts "## Deploying via git to remote=\"#{options.remote}\" and branch=\"#{options.branch}\""
 
-          camelized_strategy  = self.options.strategy.to_s.split('_').map { |word| word.capitalize}.join
+          camelized_strategy  = options.strategy.to_s.split('_').map(&:capitalize).join
           strategy_class_name = "Middleman::Deploy::Strategies::Git::#{camelized_strategy}"
-          strategy_instance   = strategy_class_name.constantize.new(self.server_instance.build_dir, self.options.remote, self.options.branch, self.options.commit_message)
+          strategy_instance   = strategy_class_name.constantize.new(build_dir, options.remote, options.branch, options.commit_message)
 
           strategy_instance.process
         end
diff --git a/lib/middleman-deploy/methods/rsync.rb b/lib/middleman-deploy/methods/rsync.rb
index 6316b35..dcc8abb 100644
--- a/lib/middleman-deploy/methods/rsync.rb
+++ b/lib/middleman-deploy/methods/rsync.rb
@@ -17,17 +17,15 @@ module Middleman
 
         def process
           # Append "@" to user if provided.
-          user      = "#{self.user}@" if self.user && !self.user.empty?
+          user      = "#{self.user}@" if user && !user.empty?
 
-          dest_url  = "#{user}#{self.host}:#{self.path}"
+          dest_url  = "#{user}#{host}:#{path}"
           flags     = self.flags || '-avz'
-          command   = "rsync #{flags} '-e ssh -p #{self.port}' #{self.server_instance.build_dir}/ #{dest_url}"
+          command   = "rsync #{flags} '-e ssh -p #{port}' #{build_dir}/ #{dest_url}"
 
-          if self.clean
-            command += ' --delete'
-          end
+          command += ' --delete' if clean
 
-          puts "## Deploying via rsync to #{dest_url} port=#{self.port}"
+          puts "## Deploying via rsync to #{dest_url} port=#{port}"
           exec command
         end
       end
diff --git a/lib/middleman-deploy/methods/sftp.rb b/lib/middleman-deploy/methods/sftp.rb
index 2db6522..572c402 100644
--- a/lib/middleman-deploy/methods/sftp.rb
+++ b/lib/middleman-deploy/methods/sftp.rb
@@ -6,13 +6,13 @@ module Middleman
     module Methods
       class Sftp < Ftp
         def process
-          puts "## Deploying via sftp to #{self.user}@#{self.host}:#{path}"
+          puts "## Deploying via sftp to #{user}@#{host}:#{path}"
 
           # `nil` is a valid value for user and/or pass.
-          Net::SFTP.start(self.host, self.user, password: self.pass, port: self.port) do |sftp|
-            sftp.mkdir(self.path)
+          Net::SFTP.start(host, user, password: pass, port: port) do |sftp|
+            sftp.mkdir(path)
 
-            Dir.chdir(self.server_instance.build_dir) do
+            Dir.chdir(build_dir) do
               filtered_files.each do |filename|
                 if File.directory?(filename)
                   upload_directory(sftp, filename)
@@ -26,17 +26,15 @@ module Middleman
 
         protected
 
-        def handle_exception(exception,filename, file_path)
+        def handle_exception(exception, filename, file_path)
           reply     = exception.message
           err_code  = reply[0, 3].to_i
 
-          if err_code == 550
-            sftp.upload(filename, file_path)
-          end
+          sftp.upload(filename, file_path) if err_code == 550
         end
 
         def upload_directory(sftp, filename)
-          file_path = "#{self.path}/#{filename}"
+          file_path = "#{path}/#{filename}"
 
           begin
             sftp.mkdir(file_path)
@@ -46,7 +44,7 @@ module Middleman
         end
 
         def upload_file(sftp, filename)
-          file_path = "#{self.path}/#{filename}"
+          file_path = "#{path}/#{filename}"
 
           begin
             sftp.upload(filename, file_path)
diff --git a/lib/middleman-deploy/pkg-info.rb b/lib/middleman-deploy/pkg-info.rb
index 528565f..bde3750 100644
--- a/lib/middleman-deploy/pkg-info.rb
+++ b/lib/middleman-deploy/pkg-info.rb
@@ -1,9 +1,9 @@
 module Middleman
   module Deploy
     PACKAGE = 'middleman-deploy'
-    VERSION = '1.0.0'
+    VERSION = '2.0.0-alpha'
     TAGLINE = 'Deploy a middleman built site over rsync, ftp, sftp, or git (e.g. gh-pages on github).'
-    README = %Q{
+    README = %{
 You should follow one of the four examples below to setup the deploy
 extension in config.rb.
 
diff --git a/lib/middleman-deploy/strategies/git/base.rb b/lib/middleman-deploy/strategies/git/base.rb
index 08a6d91..f0a667b 100644
--- a/lib/middleman-deploy/strategies/git/base.rb
+++ b/lib/middleman-deploy/strategies/git/base.rb
@@ -15,7 +15,7 @@ module Middleman
           end
 
           def process
-            raise NotImplementedError
+            fail NotImplementedError
           end
 
           protected
@@ -29,24 +29,25 @@ module Middleman
 
           def checkout_branch
             # if there is a branch with that name, switch to it, otherwise create a new one and switch to it
-            if `git branch`.split("\n").any? { |b| b =~ /#{self.branch}/i }
-              `git checkout #{self.branch}`
+            if `git branch`.split("\n").any? { |b| b =~ /#{branch}/i }
+              `git checkout #{branch}`
             else
-              `git checkout -b #{self.branch}`
+              `git checkout -b #{branch}`
             end
           end
 
           def commit_branch(options = '')
-            message = self.commit_message ? self.commit_message : add_signature_to_commit_message('Automated commit')
+            message = commit_message ? commit_message : add_signature_to_commit_message('Automated commit')
 
-            run_or_fail("git add -A")
+            run_or_fail('git add -A')
             run_or_fail("git commit --allow-empty -am \"#{message}\"")
-            run_or_fail("git push #{options} origin #{self.branch}")
+            run_or_fail("git push #{options} origin #{branch}")
           end
 
           private
+
           def run_or_fail(command)
-            system(command) || raise("ERROR running: #{command}")
+            system(command) || fail("ERROR running: #{command}")
           end
         end
       end
diff --git a/lib/middleman-deploy/strategies/git/force_push.rb b/lib/middleman-deploy/strategies/git/force_push.rb
index 113d385..5c1348c 100644
--- a/lib/middleman-deploy/strategies/git/force_push.rb
+++ b/lib/middleman-deploy/strategies/git/force_push.rb
@@ -4,7 +4,7 @@ module Middleman
       module Git
         class ForcePush < Base
           def process
-            Dir.chdir(self.build_dir) do
+            Dir.chdir(build_dir) do
               add_remote_url
               checkout_branch
               commit_branch('-f')
@@ -19,8 +19,8 @@ module Middleman
             unless File.exist?('.git')
               `git init`
               `git remote add origin #{url}`
-              `git config user.name "#{self.user_name}"`
-              `git config user.name "#{self.user_email}"`
+              `git config user.name "#{user_name}"`
+              `git config user.email "#{user_email}"`
             else
               # check if the remote repo has changed
               unless url == `git config --get remote.origin.url`.chop
@@ -28,9 +28,9 @@ module Middleman
                 `git remote add origin #{url}`
               end
               # check if the user name has changed
-              `git config user.name "#{self.user_name}"` unless self.user_name == `git config --get user.name`
+              `git config user.name "#{user_name}"` unless user_name == `git config --get user.name`
               # check if the user email has changed
-              `git config user.email "#{self.user_email}"` unless self.user_email == `git config --get user.email`
+              `git config user.email "#{user_email}"` unless user_email == `git config --get user.email`
             end
           end
 
diff --git a/lib/middleman-deploy/strategies/git/submodule.rb b/lib/middleman-deploy/strategies/git/submodule.rb
index 0b91712..e974226 100644
--- a/lib/middleman-deploy/strategies/git/submodule.rb
+++ b/lib/middleman-deploy/strategies/git/submodule.rb
@@ -4,7 +4,7 @@ module Middleman
       module Git
         class Submodule < Base
           def process
-            Dir.chdir(self.build_dir) do
+            Dir.chdir(build_dir) do
               checkout_branch
               pull_submodule
               commit_branch
@@ -19,7 +19,7 @@ module Middleman
             current_branch  = `git rev-parse --abbrev-ref HEAD`
             message         = add_signature_to_commit_message('Deployed')
 
-            `git add #{self.build_dir}`
+            `git add #{build_dir}`
             `git commit --allow-empty -m "#{message}"`
             `git push origin #{current_branch}`
           end
@@ -27,11 +27,11 @@ module Middleman
           def pull_submodule
             `git fetch`
             `git stash`
-            `git rebase #{self.remote}/#{self.branch}`
+            `git rebase #{remote}/#{branch}`
             `git stash pop`
 
-            if $?.exitstatus == 1
-              puts "Can't deploy! Please resolve conflicts. Then process to manual commit and push on #{self.branch} branch."
+            if $CHILD_STATUS.exitstatus == 1
+              puts "Can't deploy! Please resolve conflicts. Then process to manual commit and push on #{branch} branch."
               exit
             end
           end