Rakefile in resque-scheduler-1.8.2 vs Rakefile in resque-scheduler-1.9.1

@@ -34,9 +34,10 @@
     gemspec.email = "[e-mail]"
     gemspec.homepage = "http://github.com/bvandenbos/resque-scheduler"
     gemspec.authors = ["Ben VandenBos"]
     gemspec.version = ResqueScheduler::Version
 
+    gemspec.add_dependency "redis", ">= 2.0.1"
     gemspec.add_dependency "resque", ">= 1.8.0"
     gemspec.add_dependency "rufus-scheduler"
     gemspec.add_development_dependency "jeweler"
     gemspec.add_development_dependency "mocha"
     gemspec.add_development_dependency "rack-test"