sign.gemspec in sign-1.0.1 vs sign.gemspec in sign-1.0.2

@@ -25,9 +25,10 @@
     f.match(%r{^(test|spec|features)/})
   end
   spec.bindir        = "bin"
   spec.executables   = spec.files.grep(%r{^bin/sign}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
+  spec.required_ruby_version = '>= 2.2.8'
 
   spec.add_development_dependency "bundler", "~> 1.15"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end