Appraisals in calculated_attributes-0.1.5 vs Appraisals in calculated_attributes-0.2.0

@@ -1,15 +1,19 @@
 appraise 'rails3' do
-  gem 'activerecord', '3.2.21'
+  gem 'activerecord', '~> 3.2'
 end
 
 appraise 'rails4_1' do
-  gem 'activerecord', '4.1.11'
+  gem 'activerecord', '~> 4.1'
 end
 
 appraise 'rails4_2' do
-  gem 'activerecord', '4.2.2'
+  gem 'activerecord', '~> 4.2'
 end
 
 appraise 'rails5_0' do
-  gem 'activerecord', '5.0.0'
+  gem 'activerecord', '~> 5.0'
+end
+
+appraise 'rails5_1' do
+  gem 'activerecord', '~> 5.1'
 end