rails-tracer.gemspec in rails-tracer-0.4.1 vs rails-tracer.gemspec in rails-tracer-0.4.2

@@ -2,16 +2,19 @@
 lib = File.expand_path("../lib", __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 Gem::Specification.new do |spec|
   spec.name          = "rails-tracer"
-  spec.version       = "0.4.1"
+  spec.version       = "0.4.2"
   spec.authors       = ["iaintshine"]
   spec.email         = ["[e-mail]"]
 
   spec.summary       = %q{Rack OpenTracing middleware enhanced for Rails}
   spec.description   = %q{}
   spec.homepage      = "https://github.com/iaintshine/ruby-rails-tracer"
+  spec.license       = "Apache-2.0"
+
+  spec.required_ruby_version = ">= 2.2.0"
 
   spec.files         = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end
   spec.bindir        = "exe"