sidekiq_4.x.gemfile in sidekiq-prometheus-exporter-0.1.1

- old
+ new

@@ -1,7 +1,8 @@
 # This file was generated by Appraisal
 
 source "https://rubygems.org"
 
+gem "redis", ">= 3.3.5"
 gem "sidekiq", "~> 4.0"
 
 gemspec path: "../"