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

Gem::Specification.new do |spec|
  spec.name          = "active_model-jobs"
  spec.version       = ActiveModel::Jobs::VERSION
  spec.authors       = ["Tom Scott"]
  spec.email         = ["tscott@weblinc.com"]

  spec.summary       = 'This gem has been renamed active_model_jobs.'
  spec.description   = spec.summary
  spec.homepage      = "http://github.com/tubbo/active_model_jobs"
  spec.license       = "MIT"

  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
    f.match(%r{^(spec)/})
  end

  spec.bindir        = "exe"
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  spec.add_development_dependency "bundler"
  spec.add_development_dependency "rake"
  spec.add_development_dependency "rspec"
  spec.add_development_dependency "rubocop", ">= 0.49.0"
  spec.add_development_dependency "simplecov"
  spec.add_development_dependency "yard", ">= 0.9.20"

  spec.add_dependency "activejob", ">= 5.0.0"
  spec.add_dependency "activemodel", ">= 5.0.0"
end
```

Change back to original gemspec
user
```ruby
# frozen_string_literal: true

lib = File.expand_path('lib', __dir__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'active_model/jobs/version'

Gem::Specification.new do |spec|
  spec.name          = "active_model_jobs"
  spec.version       = ActiveModel::Jobs::VERSION
  spec.authors       = ["Tom Scott"]
  spec.email         = ["tscott@weblinc.com"]

  spec.summary       = 'Enqueue background jobs from model classes'
  spec.description   = spec.summary
  spec.homepage      = "http://github.com/tubbo/active_model_jobs"
  spec.license       = "MIT"

  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
    f.match(%r{^(spec)/})
  end

  spec.bindir        = "exe"
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  spec.add_development_dependency "bundler"
  spec.add_development_dependency "rake"
  spec.add_development_dependency "rspec"
  spec.add_development_dependency "rubocop", ">= 0.49.0"
  spec.add_development_dependency "simplecov"
  spec.add_development_dependency "yard", ">= 0.9.20"

  spec.add_dependency "activejob", ">= 5.0.0"
  spec.add_dependency "activemodel", ">= 5.0.0"
end
```
assistant