redis_failover.gemspec in redis_failover-0.5.4 vs redis_failover.gemspec in redis_failover-0.6.0

@@ -15,11 +15,11 @@
   gem.require_paths = ["lib"]
   gem.version       = RedisFailover::VERSION
 
   gem.add_dependency('redis')
   gem.add_dependency('redis-namespace')
-  gem.add_dependency('multi_json')
-  gem.add_dependency('zk')
+  gem.add_dependency('multi_json', '>= 1.0', '< 1.3')
+  gem.add_dependency('zk', '~> 0.8.8')
 
   gem.add_development_dependency('rake')
   gem.add_development_dependency('rspec')
 end