diff --git a/larksuite-oapi/src/main/java/com/lark/oapi/event/EventDispatcher.java b/larksuite-oapi/src/main/java/com/lark/oapi/event/EventDispatcher.java
index 7a60ef74f..54d390b61 100644
--- a/larksuite-oapi/src/main/java/com/lark/oapi/event/EventDispatcher.java
+++ b/larksuite-oapi/src/main/java/com/lark/oapi/event/EventDispatcher.java
@@ -185,6 +185,7 @@ public void doWithoutValidation(byte[] payload) throws Throwable {
 
         EventReq req = new EventReq();
         req.setBody(payload);
+        req.setPlain(pl);
         Object eventMsg = handler.getEvent();
         if (handler instanceof CustomEventHandler) {
             eventMsg = req;