Gemfile in celluloid_pubsub-0.8.1 vs Gemfile in celluloid_pubsub-0.8.2

@@ -1,3 +1,9 @@
 source 'http://rubygems.org'
 
 gemspec
+
+if RUBY_VERSION >= "2.2.0"
+  gem 'activesupport', '>= 4.0', '>= 4.0'
+else
+  gem 'activesupport', '>= 4.0', '< 5.0'
+end