diff --git a/lib/wx_pay/service.rb b/lib/wx_pay/service.rb
index f47eb94..80ffdac 100644
--- a/lib/wx_pay/service.rb
+++ b/lib/wx_pay/service.rb
@@ -1,5 +1,5 @@
-require 'cgi'
-require 'open-uri'
+require 'rest_client'
+require 'active_support/core_ext/hash/conversions'
 
 module WxPay
   module Service
diff --git a/lib/wx_pay/version.rb b/lib/wx_pay/version.rb
index b74bf19..8fceebc 100644
--- a/lib/wx_pay/version.rb
+++ b/lib/wx_pay/version.rb
@@ -1,3 +1,3 @@
 module WxPay
-  VERSION = "0.0.2"
+  VERSION = "0.0.3"
 end
diff --git a/wx_pay.gemspec b/wx_pay.gemspec
index 38c51e5..654a26e 100644
--- a/wx_pay.gemspec
+++ b/wx_pay.gemspec
@@ -17,8 +17,8 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_runtime_dependency "rest-client", '~> 1.7'
-  s.add_runtime_dependency "activesupport", '~> 4'
+  s.add_runtime_dependency "rest-client", '>= 1.7'
+  s.add_runtime_dependency "activesupport", '>= 4'
 
   s.add_development_dependency "bundler", '~> 1'
   s.add_development_dependency "rake", '~> 10'
--
libgit2 0.21.0