diff --git a/lib/dingtalk/api/message.rb b/lib/dingtalk/api/message.rb
index ebc6cc6..eb6ff3f 100644
--- a/lib/dingtalk/api/message.rb
+++ b/lib/dingtalk/api/message.rb
@@ -2,7 +2,7 @@ module Dingtalk
   module Api
     class Message < Base
       def send_with(params)
-        http_post('send', params)
+        http_post("send?access_token=#{access_token}", params)
       end
 
       private
--
libgit2 0.21.0