object_table.gemspec in object_table-0.3.4 vs object_table.gemspec in object_table-0.4.0

@@ -16,9 +16,11 @@
   spec.files         = `git ls-files`.split($/)
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = '>= 2.0'
+
   spec.add_runtime_dependency 'narray', "~> 0.6.1"
 
   spec.add_development_dependency "bundler", "~> 1.3"
   spec.add_development_dependency "rake"
   spec.add_development_dependency 'rspec', "~> 3.1"