Gemfile in resque-scheduler-4.3.1 vs Gemfile in resque-scheduler-4.4.0

@@ -1,4 +1,12 @@
 # vim:fileencoding=utf-8
 source 'https://rubygems.org'
 
+case req = ENV['RESQUE']
+when nil
+when 'master'
+  gem 'resque', git: 'https://github.com/resque/resque'
+else
+  gem 'resque', req
+end
+
 gemspec