ziptz.gemspec in ziptz-3.0.13 vs ziptz.gemspec in ziptz-3.0.14

@@ -15,6 +15,7 @@
   s.extra_rdoc_files = ['README.md', 'LICENSE']
   s.files = Dir['[A-Z]*', '{data,lib,spec}/**/*', 'ziptz.gemspec']
   s.test_files = Dir.glob('spec/**/*_spec.rb')
   s.require_paths = ['lib']
   s.required_ruby_version = '>= 2.0.0'
+  s.metadata['rubygems_mfa_required'] = 'true'
 end