```ruby
# -*- encoding: utf-8 -*-
require File.expand_path("../lib/html/pipeline/version", __FILE__)

Gem::Specification.new do |gem|
  gem.name          = "html-pipeline"
  gem.version       = HTML::Pipeline::VERSION
  gem.license       = "MIT"
  gem.authors       = ["Ryan Tomayko", "Jerry Cheung"]
  gem.email         = ["ryan@github.com", "jerry@github.com"]
  gem.description   = %q{GitHub HTML processing filters and utilities}
  gem.summary       = %q{Helpers for processing content through a chain of filters}
  gem.homepage      = "https://github.com/jch/html-pipeline"

  gem.files         = `git ls-files`.split $/
  gem.test_files    = gem.files.grep(%r{^test})
  gem.require_paths = ["lib"]

  gem.add_dependency "nokogiri",      RUBY_VERSION < "1.9.2" ? [">= 1.4", "< 1.6"] : "~> 1.4"
  gem.add_dependency "activesupport", RUBY_VERSION < "1.9.3" ? [">= 2", "< 4"] : ">= 2"

  gem.post_install_message = <<msg
-------------------------------------------------
Thank you for installing html-pipeline!
You must bundle Filter gem dependencies.
See html-pipeline README.md for more details.
https://github.com/jch/html-pipeline#dependencies
-------------------------------------------------
msg
end
```

Remove RUBY_VERSION conditionals from gemspec
user
```ruby
# -*- encoding: utf-8 -*-
require File.expand_path("../lib/html/pipeline/version", __FILE__)

Gem::Specification.new do |gem|
  gem.name          = "html-pipeline"
  gem.version       = HTML::Pipeline::VERSION
  gem.license       = "MIT"
  gem.authors       = ["Ryan Tomayko", "Jerry Cheung"]
  gem.email         = ["ryan@github.com", "jerry@github.com"]
  gem.description   = %q{GitHub HTML processing filters and utilities}
  gem.summary       = %q{Helpers for processing content through a chain of filters}
  gem.homepage      = "https://github.com/jch/html-pipeline"

  gem.files         = `git ls-files`.split $/
  gem.test_files    = gem.files.grep(%r{^test})
  gem.require_paths = ["lib"]

  gem.add_dependency "nokogiri", "~> 1.4"
  gem.add_dependency "activesupport", ">= 2"

  gem.post_install_message = <<msg
-------------------------------------------------
Thank you for installing html-pipeline!
You must bundle Filter gem dependencies.
See html-pipeline README.md for more details.
https://github.com/jch/html-pipeline#dependencies
-------------------------------------------------
msg
end
```
assistant