diff --git a/src/main/java/edu/kis/vh/nursery/list/Node.java b/src/main/java/edu/kis/vh/nursery/list/Node.java
index 0a2cd75e..abd6bc5c 100644
--- a/src/main/java/edu/kis/vh/nursery/list/Node.java
+++ b/src/main/java/edu/kis/vh/nursery/list/Node.java
@@ -2,7 +2,7 @@
 
 public class Node {
 
-    public int value;
+    public final int value;
     public Node prev, next;
 
     public Node(int i) {