diff --git a/Gemfile b/Gemfile
index 1d2663059..fa75df156 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,11 +1,3 @@
 source 'https://rubygems.org'
 
 gemspec
-
-group :development do
-  gem 'growl'
-  gem 'guard'
-  gem 'guard-bundler'
-  gem 'guard-rspec'
-  gem 'rb-fsevent'
-end
diff --git a/omniauth.gemspec b/omniauth.gemspec
index b6482b28c..0fd538559 100644
--- a/omniauth.gemspec
+++ b/omniauth.gemspec
@@ -7,15 +7,20 @@ Gem::Specification.new do |gem|
   gem.authors = ['Michael Bleigh', 'Erik Michaels-Ober']
   gem.email = ['michael@intridea.com', 'sferik@gmail.com']
 
-  gem.add_runtime_dependency 'rack'
+  gem.add_runtime_dependency 'rack', '~> 1.0'
   gem.add_runtime_dependency 'hashie', '~> 1.2'
 
-  gem.add_development_dependency 'simplecov', '~> 0.4'
-  gem.add_development_dependency 'rack-test', '~> 0.5'
-  gem.add_development_dependency 'rake', '~> 0.8'
-  gem.add_development_dependency 'rdiscount', '~> 1.6'
-  gem.add_development_dependency 'rspec', '~> 2.7'
-  gem.add_development_dependency 'yard', '~> 0.7'
+  gem.add_development_dependency 'growl'
+  gem.add_development_dependency 'guard'
+  gem.add_development_dependency 'guard-bundler'
+  gem.add_development_dependency 'guard-rspec'
+  gem.add_development_dependency 'simplecov'
+  gem.add_development_dependency 'rack-test'
+  gem.add_development_dependency 'rake'
+  gem.add_development_dependency 'rb-fsevent'
+  gem.add_development_dependency 'rdiscount'
+  gem.add_development_dependency 'rspec'
+  gem.add_development_dependency 'yard'
 
   gem.version = OmniAuth::VERSION
   gem.files = `git ls-files`.split("\n")