diff --git a/spring-boot/cache/src/main/java/io/reflectoring/cache/dao/Car.java b/spring-boot/cache/src/main/java/io/reflectoring/cache/dao/Car.java
index 3ed5e95..9a18270 100644
--- a/spring-boot/cache/src/main/java/io/reflectoring/cache/dao/Car.java
+++ b/spring-boot/cache/src/main/java/io/reflectoring/cache/dao/Car.java
@@ -1,5 +1,8 @@
 package io.reflectoring.cache.dao;
 
+import com.hazelcast.nio.ObjectDataInput;
+import com.hazelcast.nio.ObjectDataOutput;
+import com.hazelcast.nio.serialization.DataSerializable;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
@@ -9,7 +12,7 @@ import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
-import java.io.Serializable;
+import java.io.IOException;
 import java.util.UUID;
 
 @Entity
@@ -17,11 +20,25 @@ import java.util.UUID;
 @NoArgsConstructor
 @AllArgsConstructor
 @Builder
-public class Car implements Serializable {
+public class Car implements DataSerializable {
 
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private UUID id;
     private String name;
     private String color;
+
+    @Override
+    public void writeData(ObjectDataOutput out) throws IOException {
+        out.writeUTF(id.toString());
+        out.writeUTF(name);
+        out.writeUTF(color);
+    }
+
+    @Override
+    public void readData(ObjectDataInput in) throws IOException {
+        id = UUID.fromString(in.readUTF());
+        name = in.readUTF();
+        color = in.readUTF();
+    }
 }