diff --git a/src/api/phase2/guestbook.js b/src/api/phase2/guestbook.js
index 6b256a9b..0ac6c278 100644
--- a/src/api/phase2/guestbook.js
+++ b/src/api/phase2/guestbook.js
@@ -30,7 +30,7 @@ const del=function (id){
  * }
  * */
 const answer=function (data){
-  return ajax.post(baseURL,'/xboe/subgroup/m/guest/answer',data);
+  return ajax.postJson(baseURL,'/xboe/subgroup/m/guest/answer',data);
 }
 
 /**