diff --git a/src/org/redkale/source/Flipper.java b/src/org/redkale/source/Flipper.java
index f81b73755..a296dec7b 100644
--- a/src/org/redkale/source/Flipper.java
+++ b/src/org/redkale/source/Flipper.java
@@ -14,7 +14,7 @@ import java.io.Serializable;
  *
  * @author zhangjx
  */
-public final class Flipper implements Serializable {
+public final class Flipper implements Serializable, Cloneable {
 
     public static int DEFAULT_PAGESIZE = 20;