```ruby
require "./lib/connection_pool/version"

Gem::Specification.new do |s|
  s.name = "connection_pool"
  s.version = ConnectionPool::VERSION
  s.platform = Gem::Platform::RUBY
  s.authors = ["Mike Perham", "Damian Janowski"]
  s.email = ["mperham@gmail.com", "damian@educabilia.com"]
  s.homepage = "https://github.com/mperham/connection_pool"
  s.description = s.summary = "Generic connection pool for Ruby"

  s.files = `git ls-files`.split("\n")
  s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
  s.executables = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
  s.require_paths = ["lib"]
  s.license = "MIT"
  s.add_development_dependency "bundler"
  s.add_development_dependency "minitest", ">= 5.0.0"
  s.add_development_dependency "rake"
  s.required_ruby_version = ">= 2.3.0"
end
```

Update gemspec to avoid backticks
user
```ruby
require "./lib/connection_pool/version"

Gem::Specification.new do |s|
  s.name = "connection_pool"
  s.version = ConnectionPool::VERSION
  s.platform = Gem::Platform::RUBY
  s.authors = ["Mike Perham", "Damian Janowski"]
  s.email = ["mperham@gmail.com", "damian@educabilia.com"]
  s.homepage = "https://github.com/mperham/connection_pool"
  s.description = s.summary = "Generic connection pool for Ruby"

  s.files = ["Changes.md", "LICENSE", "README.md", "connection_pool.gemspec",
             "lib/connection_pool.rb", "lib/connection_pool/timed_stack.rb",
             "lib/connection_pool/version.rb", "lib/connection_pool/wrapper.rb"]
  s.test_files = ["test/helper.rb", "test/test_connection_pool.rb", "test/test_connection_pool_timed_stack.rb"]
  s.executables = []
  s.require_paths = ["lib"]
  s.license = "MIT"
  s.add_development_dependency "bundler"
  s.add_development_dependency "minitest", ">= 5.0.0"
  s.add_development_dependency "rake"
  s.required_ruby_version = ">= 2.3.0"
end
```
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