diff --git a/Gemfile b/Gemfile
index 93ba66c9..e1db7346 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,10 +1,4 @@
 source 'http://rubygems.org'
 
-gem 'rails', '3.0.3'
-gem 'sqlite3-ruby', :require => 'sqlite3'
-gem 'mocha'
-gem 'rspec-rails'
-gem 'ruby-debug'
-gem 'cucumber'
-gem "aruba"
+gemspec
 
diff --git a/lib/shoulda/matchers/integrations/rspec.rb b/lib/shoulda/matchers/integrations/rspec.rb
index 927293ff..2e1b9286 100644
--- a/lib/shoulda/matchers/integrations/rspec.rb
+++ b/lib/shoulda/matchers/integrations/rspec.rb
@@ -9,15 +9,23 @@ end
 
 if defined?(::ActionController)
   require 'shoulda/matchers/action_controller'
-  module RSpec::Rails::ControllerExampleGroup
-    include Shoulda::Matchers::ActionController
+  module RSpec
+    module Rails
+      module ControllerExampleGroup
+        include Shoulda::Matchers::ActionController
+      end
+    end
   end
 end
 
 if defined?(::ActionMailer)
   require 'shoulda/matchers/action_mailer'
-  module RSpec::Rails::MailerExampleGroup
-    include Shoulda::Matchers::ActionMailer
+  module RSpec
+    module Rails
+      module MailerExampleGroup
+        include Shoulda::Matchers::ActionMailer
+      end
+    end
   end
 end
 
diff --git a/shoulda-matchers.gemspec b/shoulda-matchers.gemspec
index c9f20a48..842b974c 100644
--- a/shoulda-matchers.gemspec
+++ b/shoulda-matchers.gemspec
@@ -19,6 +19,14 @@ Gem::Specification.new do |s|
   s.summary = %q{Making tests easy on the fingers and eyes}
   s.description = %q{Making tests easy on the fingers and eyes}
 
+  s.add_development_dependency("rails", "3.0.3")
+  s.add_development_dependency("sqlite3-ruby", "~> 1.3.2")
+  s.add_development_dependency("mocha", "~> 0.9.10")
+  s.add_development_dependency("rspec-rails", "~> 2.3.0")
+  s.add_development_dependency("ruby-debug", "~> 0.10.4")
+  s.add_development_dependency("cucumber", "~> 0.10.0")
+  s.add_development_dependency("aruba", "~> 0.2.7")
+
   if s.respond_to? :specification_version then
     s.specification_version = 3
   else