diff --git a/lms/nladmin-system/src/main/java/org/nl/wms/util/IdUtil.java b/lms/nladmin-system/src/main/java/org/nl/wms/util/IdUtil.java
index 7af5e9a..2ff9e1a 100644
--- a/lms/nladmin-system/src/main/java/org/nl/wms/util/IdUtil.java
+++ b/lms/nladmin-system/src/main/java/org/nl/wms/util/IdUtil.java
@@ -1,7 +1,7 @@
 package org.nl.wms.util;
 
 public class IdUtil {
-    public static Long getLongId() {
+    public synchronized static Long getLongId() {
         return cn.hutool.core.util.IdUtil.getSnowflake(1, 1).nextId();
     }