Envfile in newrelic_rpm-3.7.0.174.beta

- old
+ new

@@ -1,9 +1,18 @@
 suite_condition("SideKiq requires MRI 1.9.3 or JRuby 1.6 in 1.9 mode") do
   RUBY_VERSION >= '1.9.3' || (RUBY_PLATFORM == 'java' && RUBY_VERSION >= '1.9')
 end
 
 gemfile <<-RB
+  # Latest version
   gem 'json'
-  gem 'sidekiq'
+  gem 'sidekiq', '~> 2.16.1'
+  gem 'rack'
+RB
+
+gemfile <<-RB
+  # Almost oldest supported version
+  # Having rbx issues on 2.8.0, 2.9.0 seems fine.
+  gem 'json'
+  gem 'sidekiq', '~> 2.9.0'
   gem 'rack'
 RB