diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..3ea3942
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,5 @@
+source :rubygems
+
+gem 'rspec-rails'
+gem 'activesupport'
+gem 'mocha'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..08869b2
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,26 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    activesupport (3.0.1)
+    diff-lcs (1.1.2)
+    mocha (0.9.9)
+      rake
+    rake (0.8.7)
+    rspec (2.1.0)
+      rspec-core (~> 2.1.0)
+      rspec-expectations (~> 2.1.0)
+      rspec-mocks (~> 2.1.0)
+    rspec-core (2.1.0)
+    rspec-expectations (2.1.0)
+      diff-lcs (~> 1.1.2)
+    rspec-mocks (2.1.0)
+    rspec-rails (2.1.0)
+      rspec (~> 2.1.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  activesupport
+  mocha
+  rspec-rails
diff --git a/Rakefile b/Rakefile
index 27d8c69..f43eee6 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,5 +1,5 @@
 task :default => :spec
 
 task :spec do
-  exec 'ruby -Ilib -rubygems spec/mocha_spec.rb --color'
+  exec 'bundle exec ruby -Ilib spec/mocha_spec.rb --color'
 end
diff --git a/rspec-rails-mocha.gemspec b/rspec-rails-mocha.gemspec
index 89ddb30..cd36199 100644
--- a/rspec-rails-mocha.gemspec
+++ b/rspec-rails-mocha.gemspec
@@ -1,11 +1,10 @@
 Gem::Specification.new do |gem|
   gem.name    = 'rspec-rails-mocha'
-  gem.version = '0.2.0'
+  gem.version = '0.2.1'
   gem.date    = Date.today.to_s
 
   gem.add_dependency 'mocha', '>= 0.9.8'
   gem.add_dependency 'rspec-rails', '>= 2.0.0'
-  gem.add_development_dependency 'rspec', '>= 2.0.0'
 
   gem.summary = "mock_model and stub_model with Mocha"
   gem.description = "Ports functionality of mock_model and stub_model from rspec-rails using Mocha."