diff --git a/octokit.gemspec b/octokit.gemspec
index b30aadfc1..3801d083e 100644
--- a/octokit.gemspec
+++ b/octokit.gemspec
@@ -21,4 +21,5 @@ Gem::Specification.new do |spec|
   spec.required_rubygems_version = '>= 1.3.5'
   spec.summary = 'Ruby toolkit for working with the GitHub API'
   spec.version = Octokit::VERSION.dup
+  spec.metadata = { 'rubygems_mfa_required' => 'true' }
 end