diff --git a/Gemfile b/Gemfile
index 710b9698..4f6368f5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gemspec
 gem 'jruby-openssl', :platform => :jruby
 gem 'unicorn', :platforms => [:mri, :rbx]
 gem 'rubysl', '~> 2.0', :platform => :rbx
-gem 'rack', '~> 1.6'
+gem 'rack', '~> 2.2', '>= 2.2.11'
 
 # group :benchmark do
 #   gem 'em-http-request'