turnpike.gemspec in turnpike-0.8.0 vs turnpike.gemspec in turnpike-0.9.0

@@ -13,10 +13,10 @@
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.require_paths = ['lib']
 
-  s.add_runtime_dependency 'redis', '~> 3.0'
+  s.add_runtime_dependency 'redis', '< 5'
   s.add_runtime_dependency 'msgpack', '~> 1.0'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'minitest', '~> 5.0'
 
   s.required_ruby_version = '>= 2.0'