diff --git a/weibo_2.gemspec b/weibo_2.gemspec
index 601711b..c39048b 100644
--- a/weibo_2.gemspec
+++ b/weibo_2.gemspec
@@ -20,6 +20,6 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency 'oauth2', "~> 0.9.1"
   gem.add_runtime_dependency 'hashie', "~> 2.0.4"
-  gem.add_runtime_dependency 'multi_json'  , "~> 1"
-  gem.add_runtime_dependency 'rest-client', "~> 1.7.3"
+  gem.add_runtime_dependency 'multi_json', "~> 1"
+  gem.add_runtime_dependency 'rest-client', "~> 1.8"
 end