diff --git a/lib/qiniu/rs/version.rb b/lib/qiniu/rs/version.rb
index 97e8047..4d0df71 100755
--- a/lib/qiniu/rs/version.rb
+++ b/lib/qiniu/rs/version.rb
@@ -2,6 +2,6 @@
 
 module Qiniu
   module RS
-    VERSION = "1.0.2"
+    VERSION = "1.0.3"
   end
 end
diff --git a/qiniu-rs.gemspec b/qiniu-rs.gemspec
index 60aa85f..4ce394e 100755
--- a/qiniu-rs.gemspec
+++ b/qiniu-rs.gemspec
@@ -20,6 +20,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "rake"
   gem.add_development_dependency "rspec"
   gem.add_development_dependency "fakeweb"
+  gem.add_runtime_dependency "json"
   gem.add_runtime_dependency "rest-client"
   gem.add_runtime_dependency "mime-types"
 end