clearance.gemspec in clearance-2.1.0 vs clearance.gemspec in clearance-2.2.0

@@ -1,9 +1,10 @@
 $LOAD_PATH.push File.expand_path('../lib', __FILE__)
 require 'clearance/version'
 
 Gem::Specification.new do |s|
   s.add_dependency 'bcrypt', '>= 3.1.1'
+  s.add_dependency 'argon2', '~> 2.0', '>= 2.0.2'
   s.add_dependency 'email_validator', '~> 2.0'
   s.add_dependency 'railties', '>= 5.0'
   s.add_dependency 'activemodel', '>= 5.0'
   s.add_dependency 'activerecord', '>= 5.0'
   s.add_dependency 'actionmailer', '>= 5.0'