upperkut.gemspec in upperkut-0.5.2 vs upperkut.gemspec in upperkut-0.6.0

@@ -20,10 +20,11 @@
   spec.executables   = ['upperkut']
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>= 2.2.2'
 
-  spec.add_dependency 'redis', '>= 3.3.3', '< 5'
+  spec.add_dependency 'redis',           '>= 3.3.3', '< 5'
+  spec.add_dependency 'connection_pool', '~> 2.2', '>= 2.2.2'
   spec.add_development_dependency 'bundler', '~> 1.16'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
 end