diff --git a/lib/reverse_proxy/controller.rb b/lib/reverse_proxy/controller.rb
index 3b1d742..6185e3d 100644
--- a/lib/reverse_proxy/controller.rb
+++ b/lib/reverse_proxy/controller.rb
@@ -1,3 +1,5 @@
+require 'addressable/uri'
+
 module ReverseProxy
   module Controller
     def reverse_proxy(proxy_url, options = {})