Appraisals in file_validators-2.2.0.beta1 vs Appraisals in file_validators-2.3.0

@@ -1,18 +1,22 @@
 appraise 'activemodel-3.2' do
   gem 'activemodel', '3.2.22.5'
+  gem 'rack', '1.6.5'
 end
 
 appraise 'activemodel-4.0' do
   gem 'activemodel', '4.0.13'
+  gem 'rack', '1.6.5'
 end
 
 appraise 'activemodel-4.1' do
   gem 'activemodel', '4.1.6'
+  gem 'rack', '1.6.5'
 end
 
 appraise 'activemodel-4.2' do
   gem 'activemodel', '4.2.7.1'
+  gem 'rack', '1.6.5'
 end
 
 appraise 'activemodel-5.0' do
   gem 'activemodel', '5.0.1'
 end