diff --git a/lib/dingtalk/api/call_back.rb b/lib/dingtalk/api/call_back.rb
index fcf1453..f43b229 100644
--- a/lib/dingtalk/api/call_back.rb
+++ b/lib/dingtalk/api/call_back.rb
@@ -1,16 +1,11 @@
 module Dingtalk
   module Api
     class CallBack < Base
-      def initialize
-        @suite_token = Dingtalk.suite_token
-        @suite_aes_key = Dingtalk.suite_aes_key
-      end
-
       def register_call_back(call_back_tag = [], url)
         params = {
           call_back_tag: call_back_tag,
-          token: @suite_token,
-          aes_key: @suite_aes_key,
+          token: Dingtalk.suite_token,
+          aes_key: Dingtalk.suite_aes_key,
           url: url
         }
         http_post("register_call_back?access_token=#{access_token}", params)
--
libgit2 0.21.0