```ruby
lib = File.expand_path("lib", __dir__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require "gds_zendesk/version"

Gem::Specification.new do |gem|
  gem.name          = "gds_zendesk"
  gem.version       = GDSZendesk::VERSION
  gem.authors       = ["GOV.UK Dev"]
  gem.email         = ["govuk-dev@digital.cabinet-office.gov.uk"]
  gem.description   = "Client and models for communicating with Zendesk"
  gem.summary       = "Client and models for communicating with Zendesk"
  gem.homepage      = "https://github.com/alphagov/gds_zendesk"

  gem.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
  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 = %w[lib]

  gem.add_dependency "null_logger", "~> 0"
  gem.add_dependency "zendesk_api", "~> 1.27"

  gem.add_development_dependency "rake"
  gem.add_development_dependency "rspec", "~> 3"
  gem.add_development_dependency "rubocop-govuk", "~> 3"
  gem.add_development_dependency "webmock", ">= 2"
end
```

Set a specific version for rubocop-govuk
user
```ruby
lib = File.expand_path("lib", __dir__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require "gds_zendesk/version"

Gem::Specification.new do |gem|
  gem.name          = "gds_zendesk"
  gem.version       = GDSZendesk::VERSION
  gem.authors       = ["GOV.UK Dev"]
  gem.email         = ["govuk-dev@digital.cabinet-office.gov.uk"]
  gem.description   = "Client and models for communicating with Zendesk"
  gem.summary       = "Client and models for communicating with Zendesk"
  gem.homepage      = "https://github.com/alphagov/gds_zendesk"

  gem.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
  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 = %w[lib]

  gem.add_dependency "null_logger", "~> 0"
  gem.add_dependency "zendesk_api", "~> 1.27"

  gem.add_development_dependency "rake"
  gem.add_development_dependency "rspec", "~> 3"
  gem.add_development_dependency "rubocop-govuk", "4.7.0"
  gem.add_development_dependency "webmock", ">= 2"
end
```
assistant