diff --git a/spec/mongoid/dependencies_spec.rb b/spec/mongoid/dependencies_spec.rb
index 83029ce..71653b8 100644
--- a/spec/mongoid/dependencies_spec.rb
+++ b/spec/mongoid/dependencies_spec.rb
@@ -1,4 +1,4 @@
-unless ::Rails::VERSION::STRING >= '4'
+unless ::ActiveSupport::VERSION::STRING >= '4'
   describe 'Ransack' do
     it 'can be required without errors' do
       output = `bundle exec ruby -e "require 'ransack'" 2>&1`