diff --git a/lib/reverse_proxy/client.rb b/lib/reverse_proxy/client.rb
index 1cc5bea..662fcc4 100644
--- a/lib/reverse_proxy/client.rb
+++ b/lib/reverse_proxy/client.rb
@@ -1,5 +1,6 @@
 require 'rack'
 require 'rack-proxy'
+require 'addressable/uri'
 
 module ReverseProxy
   class Client
diff --git a/rails-reverse-proxy.gemspec b/rails-reverse-proxy.gemspec
index caf22c0..49b6d32 100644
--- a/rails-reverse-proxy.gemspec
+++ b/rails-reverse-proxy.gemspec
@@ -2,16 +2,16 @@
 # DO NOT EDIT THIS FILE DIRECTLY
 # Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
 # -*- encoding: utf-8 -*-
-# stub: rails-reverse-proxy 0.5.2 ruby lib
+# stub: rails-reverse-proxy 0.5.1 ruby lib
 
 Gem::Specification.new do |s|
   s.name = "rails-reverse-proxy"
-  s.version = "0.5.2"
+  s.version = "0.5.1"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib"]
   s.authors = ["James Hu"]
-  s.date = "2016-09-27"
+  s.date = "2016-09-14"
   s.description = "Reverse proxy for Ruby on Rails"
   s.email = "hello@james.hu"
   s.extra_rdoc_files = [