```ruby
# coding: utf-8

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

Gem::Specification.new do |spec|
  spec.name                  = "rainbow"
  spec.version               = Rainbow::VERSION
  spec.authors               = ["Marcin Kulik"]
  spec.email                 = ["m@ku1ik.com"]
  spec.description           = 'Colorize printed text on ANSI terminals'
  spec.summary               = 'Colorize printed text on ANSI terminals'
  spec.homepage              = "https://github.com/sickill/rainbow"
  spec.license               = "MIT"
  spec.required_ruby_version = '>= 2.1.0'

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

  spec.add_development_dependency "bundler", "~> 1.3"
end
```

Add Olle Jonsson as author to gemspec
user
```ruby
# coding: utf-8

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

Gem::Specification.new do |spec|
  spec.name                  = "rainbow"
  spec.version               = Rainbow::VERSION
  spec.authors               = ["Marcin Kulik", "Olle Jonsson"]
  spec.email                 = ["m@ku1ik.com"]
  spec.description           = 'Colorize printed text on ANSI terminals'
  spec.summary               = 'Colorize printed text on ANSI terminals'
  spec.homepage              = "https://github.com/sickill/rainbow"
  spec.license               = "MIT"
  spec.required_ruby_version = '>= 2.1.0'

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

  spec.add_development_dependency "bundler", "~> 1.3"
end
```
assistant