diff --git a/Gemfile b/Gemfile
index a3fd689..3a2fbe7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,6 +2,8 @@ source 'https://rubygems.org'
 
 gemspec
 
+gem 'bundler', '~> 1.6'
+gem 'rake'
 gem 'minitest', '~> 5.0'
 
 platforms :mri_20 do
diff --git a/time-warp.gemspec b/time-warp.gemspec
index 77204b7..3d661d5 100644
--- a/time-warp.gemspec
+++ b/time-warp.gemspec
@@ -15,7 +15,4 @@ Gem::Specification.new do |spec|
   spec.files         = `git ls-files -z`.split("\x0")
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
-
-  spec.add_development_dependency "bundler", "~> 1.6"
-  spec.add_development_dependency "rake"
 end