```ruby
# frozen_string_literal: true

lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'wardrobe/version'

Gem::Specification.new do |spec|
  spec.name          = 'wardrobe'
  spec.version       = Wardrobe::VERSION
  spec.authors       = ['Eigil Sagafos']
  spec.email         = ['eigil@agens.no']
  spec.description   = 'Plugin based attribute system for ruby objects'
  spec.summary       = spec.description
  spec.homepage      = 'https://github.com/agensdev/wardrobe'
  spec.license       = 'MIT'

  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',        '~> 1.7'
  spec.add_development_dependency 'rake',           '~> 11.0'
  spec.add_development_dependency 'minitest',       '~> 5.9'
  spec.add_development_dependency 'minitest-utils', '~> 0.3'
  spec.add_development_dependency 'benchmark-ips',  '~> 2.7'
end
```

Set correct ruby version requirement
user
```ruby
# frozen_string_literal: true

lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'wardrobe/version'

Gem::Specification.new do |spec|
  spec.name                  = 'wardrobe'
  spec.version               = Wardrobe::VERSION
  spec.required_ruby_version = '>= 2.4.0'
  spec.authors               = ['Eigil Sagafos']
  spec.email                 = ['eigil@agens.no']
  spec.description           = 'Plugin based attribute system for ruby objects'
  spec.summary               = spec.description
  spec.homepage              = 'https://github.com/agensdev/wardrobe'
  spec.license               = 'MIT'

  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',        '~> 1.7'
  spec.add_development_dependency 'rake',           '~> 11.0'
  spec.add_development_dependency 'minitest',       '~> 5.9'
  spec.add_development_dependency 'minitest-utils', '~> 0.3'
  spec.add_development_dependency 'benchmark-ips',  '~> 2.7'
end
```
assistant