```ruby
# -*- encoding: utf-8 -*-
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'vignette/version'

Gem::Specification.new do |gem|
  gem.name          = "vignette"
  gem.version       = Vignette::VERSION
  gem.authors       = ["Geoff Hayes"]
  gem.email         = ["geoff@safeshepherd.com"]
  gem.description   = %q{Simple, effective A/b testing made easy.}
  gem.summary       = %q{With a few simple features, get A/b testing up in your application.}
  gem.homepage      = "https://github.com/hayesgm/vignette"

  gem.files         = `git ls-files`.split($/)
  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
  gem.require_paths = ["lib"]

  gem.add_dependency "activesupport"
  gem.add_dependency "actionpack"

  gem.add_development_dependency "rspec"
  gem.add_development_dependency "guard-rspec"
  gem.add_development_dependency "haml"
  gem.add_development_dependency "pry-byebug"
end
```

Add versioning for dependency gems
user
```ruby
# -*- encoding: utf-8 -*-
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'vignette/version'

Gem::Specification.new do |gem|
  gem.name          = "vignette"
  gem.version       = Vignette::VERSION
  gem.authors       = ["Geoff Hayes"]
  gem.email         = ["geoff@safeshepherd.com"]
  gem.description   = %q{Simple, effective A/b testing made easy.}
  gem.summary       = %q{With a few simple features, get A/b testing up in your application.}
  gem.homepage      = "https://github.com/hayesgm/vignette"

  gem.files         = `git ls-files`.split($/)
  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
  gem.require_paths = ["lib"]

  gem.add_dependency "activesupport", ">= 3.0"
  gem.add_dependency "actionpack", ">= 3.0"

  gem.add_development_dependency "rspec", ">= 3.2.0"
  gem.add_development_dependency "guard-rspec", ">= 4.5.0"
  gem.add_development_dependency "haml", ">= 4.0.6"
  gem.add_development_dependency "pry-byebug", ">= 0"
end
```
assistant