diff --git a/Gemfile b/Gemfile
index 1454eeb..1fa9ed2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,8 @@
 source :rubygems
 
 gem 'rake'
-gem 'activerecord', ENV['AR'] || '~>3.2.11'
-gem 'railties', ENV['AR'] || '~>3.2.11'
+gem 'activerecord', ENV['AR'] || '~> 4.0.0.beta1'
+gem 'railties', ENV['AR'] || '~> 4.0.0.beta1'
 
 group :dev do
   gem 'sqlite3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 38d2c1b..6b78866 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,83 +1,75 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    actionpack (3.2.11)
-      activemodel (= 3.2.11)
-      activesupport (= 3.2.11)
-      builder (~> 3.0.0)
+    actionpack (4.0.0.beta1)
+      activesupport (= 4.0.0.beta1)
+      builder (~> 3.1.0)
       erubis (~> 2.7.0)
-      journey (~> 1.0.4)
-      rack (~> 1.4.0)
-      rack-cache (~> 1.2)
-      rack-test (~> 0.6.1)
-      sprockets (~> 2.2.1)
-    activemodel (3.2.11)
-      activesupport (= 3.2.11)
-      builder (~> 3.0.0)
-    activerecord (3.2.11)
-      activemodel (= 3.2.11)
-      activesupport (= 3.2.11)
-      arel (~> 3.0.2)
-      tzinfo (~> 0.3.29)
-    activesupport (3.2.11)
-      i18n (~> 0.6)
-      multi_json (~> 1.0)
-    arel (3.0.2)
-    builder (3.0.4)
-    diff-lcs (1.1.3)
+      rack (~> 1.5.2)
+      rack-test (~> 0.6.2)
+    activemodel (4.0.0.beta1)
+      activesupport (= 4.0.0.beta1)
+      builder (~> 3.1.0)
+    activerecord (4.0.0.beta1)
+      activemodel (= 4.0.0.beta1)
+      activerecord-deprecated_finders (~> 0.0.3)
+      activesupport (= 4.0.0.beta1)
+      arel (~> 4.0.0.beta1)
+    activerecord-deprecated_finders (0.0.3)
+    activesupport (4.0.0.beta1)
+      i18n (~> 0.6.2)
+      minitest (~> 4.2)
+      multi_json (~> 1.3)
+      thread_safe (~> 0.1)
+      tzinfo (~> 0.3.33)
+    arel (4.0.0.beta1)
+    atomic (1.0.1)
+    builder (3.1.4)
+    diff-lcs (1.2.1)
     erubis (2.7.0)
     git (1.2.5)
-    hike (1.2.1)
-    i18n (0.6.1)
-    jeweler (1.6.4)
+    i18n (0.6.2)
+    jeweler (1.8.4)
       bundler (~> 1.0)
       git (>= 1.2.5)
       rake
-    journey (1.0.4)
-    json (1.7.6)
-    multi_json (1.5.0)
-    rack (1.4.4)
-    rack-cache (1.2)
-      rack (>= 0.4)
-    rack-ssl (1.3.3)
-      rack
+      rdoc
+    json (1.7.7)
+    minitest (4.6.1)
+    multi_json (1.6.1)
+    rack (1.5.2)
     rack-test (0.6.2)
       rack (>= 1.0)
-    railties (3.2.11)
-      actionpack (= 3.2.11)
-      activesupport (= 3.2.11)
-      rack-ssl (~> 1.3.2)
+    railties (4.0.0.beta1)
+      actionpack (= 4.0.0.beta1)
+      activesupport (= 4.0.0.beta1)
       rake (>= 0.8.7)
       rdoc (~> 3.4)
-      thor (>= 0.14.6, < 2.0)
-    rake (0.9.2.2)
-    rdoc (3.12)
+      thor (>= 0.17.0, < 2.0)
+    rake (10.0.3)
+    rdoc (3.12.2)
       json (~> 1.4)
-    rspec (2.7.0)
-      rspec-core (~> 2.7.0)
-      rspec-expectations (~> 2.7.0)
-      rspec-mocks (~> 2.7.0)
-    rspec-core (2.7.1)
-    rspec-expectations (2.7.0)
-      diff-lcs (~> 1.1.2)
-    rspec-mocks (2.7.0)
-    sprockets (2.2.2)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sqlite3 (1.3.6)
+    rspec (2.13.0)
+      rspec-core (~> 2.13.0)
+      rspec-expectations (~> 2.13.0)
+      rspec-mocks (~> 2.13.0)
+    rspec-core (2.13.0)
+    rspec-expectations (2.13.0)
+      diff-lcs (>= 1.1.3, < 2.0)
+    rspec-mocks (2.13.0)
+    sqlite3 (1.3.7)
     thor (0.17.0)
-    tilt (1.3.3)
+    thread_safe (0.1.0)
+      atomic
     tzinfo (0.3.35)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activerecord (~> 3.2.11)
+  activerecord (~> 4.0.0.beta1)
   jeweler
-  railties (~> 3.2.11)
+  railties (~> 4.0.0.beta1)
   rake
   rspec (~> 2)
   sqlite3
diff --git a/lib/standalone_migrations.rb b/lib/standalone_migrations.rb
index 79fdecc..18aea1c 100644
--- a/lib/standalone_migrations.rb
+++ b/lib/standalone_migrations.rb
@@ -1,6 +1,10 @@
 lib_path = File.expand_path("../", __FILE__)
 $:.unshift lib_path unless $:.include?(lib_path)
 
+if !ENV["RAILS_ENV"]
+  ENV["RAILS_ENV"] = ENV["DB"] || ENV["RACK_ENV"] || "development"
+end
+
 require "rubygems"
 require "rails"
 require "active_record"
@@ -13,7 +17,3 @@
 
 require "standalone_migrations/minimal_railtie_config"
 require "standalone_migrations/tasks"
-
-if !ENV["RAILS_ENV"]
-  ENV["RAILS_ENV"] = ENV["DB"] || ENV["RACK_ENV"] || Rails.env || "development"
-end
diff --git a/spec/standalone_migrations_spec.rb b/spec/standalone_migrations_spec.rb
index 0dbf1a8..a6e4474 100644
--- a/spec/standalone_migrations_spec.rb
+++ b/spec/standalone_migrations_spec.rb
@@ -31,8 +31,7 @@ def make_migration(name, options={})
     task_name = options[:task_name] || 'db:new_migration'
     migration = run("rake #{task_name} name=#{name}").match(%r{db/migrate/\d+.*.rb})[0]
     content = read(migration)
-    content.sub!(/def down.*?\send/m, "def down;puts 'DOWN-#{name}';end")
-    content.sub!(/def up.*?\send/m, "def up;puts 'UP-#{name}';end")
+    content.sub!(/def change.*?\send/m, "def change; reversible {|dir| dir.up{ puts 'UP-#{name}' }; dir.down{ puts 'DOWN-#{name}'}}; end")
     write(migration, content)
     migration.match(/\d{14}/)[0]
   end
@@ -53,23 +52,29 @@ def write_multiple_migrations
     write_rakefile %{t.migrations = "db/migrations", "db/migrations2"}
     write "db/migrate/20100509095815_create_tests.rb", <<-TXT
 class CreateTests < ActiveRecord::Migration
-  def up
-    puts "UP-CreateTests"
-  end
-
-  def down
-    puts "DOWN-CreateTests"
+  def change
+    reversible { |dir|
+      dir.up {
+        puts "UP-CreateTests"
+      }
+      dir.down{
+        puts "DOWN-CreateTests"
+      }
+    }
   end
 end
     TXT
     write "db/migrate/20100509095816_create_tests2.rb", <<-TXT
 class CreateTests2 < ActiveRecord::Migration
-  def up
-    puts "UP-CreateTests2"
-  end
-
-  def down
-    puts "DOWN-CreateTests2"
+  def change
+    reversible { |dir|
+      dir.up {
+        puts "UP-CreateTests2"
+      }
+      dir.down{
+        puts "DOWN-CreateTests2"
+      }
+    }
   end
 end
     TXT
diff --git a/standalone_migrations.gemspec b/standalone_migrations.gemspec
index 227fad5..0303654 100644
--- a/standalone_migrations.gemspec
+++ b/standalone_migrations.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Todd Huss", "Michael Grosser"]
-  s.date = "2013-02-25"
+  s.date = "2013-02-27"
   s.email = "thuss@gabrito.com"
   s.extra_rdoc_files = [
     "README.markdown"
@@ -46,7 +46,7 @@ Gem::Specification.new do |s|
   ]
   s.homepage = "http://github.com/thuss/standalone-migrations"
   s.require_paths = ["lib"]
-  s.rubygems_version = "1.8.24"
+  s.rubygems_version = "1.8.23"
   s.summary = "A thin wrapper to use Rails Migrations in non Rails projects"
 
   if s.respond_to? :specification_version then
@@ -54,17 +54,17 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<rake>, [">= 0"])
-      s.add_runtime_dependency(%q<activerecord>, ["~> 3.2.11"])
-      s.add_runtime_dependency(%q<railties>, ["~> 3.2.11"])
+      s.add_runtime_dependency(%q<activerecord>, ["~> 4.0.0.beta1"])
+      s.add_runtime_dependency(%q<railties>, ["~> 4.0.0.beta1"])
     else
       s.add_dependency(%q<rake>, [">= 0"])
-      s.add_dependency(%q<activerecord>, ["~> 3.2.11"])
-      s.add_dependency(%q<railties>, ["~> 3.2.11"])
+      s.add_dependency(%q<activerecord>, ["~> 4.0.0.beta1"])
+      s.add_dependency(%q<railties>, ["~> 4.0.0.beta1"])
     end
   else
     s.add_dependency(%q<rake>, [">= 0"])
-    s.add_dependency(%q<activerecord>, ["~> 3.2.11"])
-    s.add_dependency(%q<railties>, ["~> 3.2.11"])
+    s.add_dependency(%q<activerecord>, ["~> 4.0.0.beta1"])
+    s.add_dependency(%q<railties>, ["~> 4.0.0.beta1"])
   end
 end