diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 4e0d42a45..4a79d6d93 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -3,7 +3,7 @@ class WechatsController < ActionController::Base
   wechat_responder
 
   include ApplicationHelper
-  ROOT_URL = "#{Setting.protocol}://#{Setting.host_name}"
+  ROOT_URL = ENV["wechat_url"]  || "#{Setting.protocol}://#{Setting.host_name}"
   #ROOT_URL = "http://www.trustie.net"
   # default text responder when no other match
   on :text do |request, content|