unicode-age.gemspec in unicode-age-2.2.0 vs unicode-age.gemspec in unicode-age-2.3.0

@@ -14,8 +14,9 @@
 
   gem.files         = Dir["{**/}{.*,*}"].select{ |path| File.file?(path) && path !~ /^pkg/ }
   gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ["lib"]
+  gem.metadata      = { "rubygems_mfa_required" => "true" }
 
   gem.required_ruby_version = ">= 2.0", "< 4.0"
 end