diff --git a/mailbox-lan/src/main/java/com/biutag/lan/domain/vo/MailVo.java b/mailbox-lan/src/main/java/com/biutag/lan/domain/vo/MailVo.java
index f908071..48020a5 100644
--- a/mailbox-lan/src/main/java/com/biutag/lan/domain/vo/MailVo.java
+++ b/mailbox-lan/src/main/java/com/biutag/lan/domain/vo/MailVo.java
@@ -324,7 +324,7 @@ public class MailVo {
     /**
      * 主办层级
      */
-    private Integer mainDeptLevel;
+    private String mainDeptLevel;
 
     /**
      * 信件后续审批流程