diff --git a/Gemfile b/Gemfile
index 122c549..ca49366 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,6 +2,8 @@ source "https://rubygems.org"
 
 gemspec
 
-group :test do
-  gem 'rake'
+group :development, :test do
+  gem 'rake',    ['>= 0.9.2.2', '< 10.2']
+  gem 'webmock', '~> 1.7'
+  gem 'rspec',   '~> 2.8'
 end
diff --git a/rest-client.gemspec b/rest-client.gemspec
index 9e26d10..5305d43 100644
--- a/rest-client.gemspec
+++ b/rest-client.gemspec
@@ -14,10 +14,9 @@ Gem::Specification.new do |s|
   s.homepage = 'http://github.com/rest-client/rest-client'
   s.summary = 'Simple HTTP and REST client for Ruby, inspired by microframework syntax for specifying actions.'
 
-  s.add_runtime_dependency(%q<mime-types>, [">= 1.16"])
-  s.add_development_dependency(%q<webmock>, ["~> 1.4"])
-  s.add_development_dependency(%q<rspec>, ["~> 2.4"])
-  s.add_dependency(%q<netrc>, ["~> 0.7.7"])
-  s.add_dependency(%q<rdoc>, [">= 2.4.2"])
+  s.add_development_dependency('bundler', ['~> 1.3.0'])
+  s.add_runtime_dependency('mime-types', ['>= 1.16'])
+  s.add_dependency('netrc', ['~> 0.7.7'])
+  s.add_dependency('rdoc', ['>= 2.4.2'])
 end