diff --git a/luoo_common/src/main/java/util/IdWorker.java b/luoo_common/src/main/java/util/IdWorker.java
index c32da18..f40451a 100644
--- a/luoo_common/src/main/java/util/IdWorker.java
+++ b/luoo_common/src/main/java/util/IdWorker.java
@@ -80,7 +80,7 @@ public class IdWorker {
     public synchronized long nextId() {
         long timestamp = timeGen();
         if (timestamp < lastTimestamp) {
-            throw new BizException(String.format("Clock moved backwards.  Refusing to generate id for %d milliseconds", lastTimestamp - timestamp));
+            throw new RuntimeException(String.format("Clock moved backwards.  Refusing to generate id for %d milliseconds", lastTimestamp - timestamp));
         }
 
         if (lastTimestamp == timestamp) {