diff --git a/two_factor_authentication.gemspec b/two_factor_authentication.gemspec
index a95b2ed8..9580f117 100644
--- a/two_factor_authentication.gemspec
+++ b/two_factor_authentication.gemspec
@@ -9,6 +9,7 @@ Gem::Specification.new do |s|
   s.email       = ["dmitrii.golub@gmail.com"]
   s.homepage    = "https://github.com/Houdini/two_factor_authentication"
   s.summary     = %q{Two factor authentication plugin for devise}
+  s.license     = "MIT"
   s.description = <<-EOF
     ### Features ###
     * control sms code pattern