rack-graphql.gemspec in rack-graphql-0.1.0 vs rack-graphql.gemspec in rack-graphql-0.2.0

@@ -20,9 +20,11 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.required_ruby_version = '>= 2.4'
+
   spec.add_dependency 'graphql', '>= 1.9.0'
   spec.add_dependency 'multi_json'
   spec.add_dependency 'rack', '>= 2.0.0'
 
   spec.add_development_dependency 'bundler', '~> 2.0'