diff --git a/unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java b/unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java
index 648a70462..fbe825b31 100644
--- a/unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java
+++ b/unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java
@@ -28,9 +28,9 @@ package com.iluwatar.unitofwork;
  * {@link Student} is an entity.
  */
 public class Student {
-  private Integer id;
-  private String name;
-  private String address;
+  private final Integer id;
+  private final String name;
+  private final String address;
 
   /**
    * @param id      student unique id