diff --git a/capistrano-chruby.gemspec b/capistrano-chruby.gemspec
index 91beb30..1b6ff54 100644
--- a/capistrano-chruby.gemspec
+++ b/capistrano-chruby.gemspec
@@ -10,6 +10,7 @@ Gem::Specification.new do |gem|
   gem.description   = %q{chruby integration for Capistrano}
   gem.summary       = %q{chruby integration for Capistrano}
   gem.homepage      = "https://github.com/kirs/chruby"
+  gem.metadata      = { "rubygems_mfa_required" => "true" }
   gem.license       = "MIT"
 
   gem.files         = `git ls-files`.split($/)