diff --git a/VL03-02-01/src/main/java/de/dhbw/parprog/Account.java b/VL03-02-01/src/main/java/de/dhbw/parprog/Account.java
index bb8d8ad..4c99e83 100644
--- a/VL03-02-01/src/main/java/de/dhbw/parprog/Account.java
+++ b/VL03-02-01/src/main/java/de/dhbw/parprog/Account.java
@@ -23,7 +23,7 @@ public class Account {
   /**
    * The bank account number.
    */
-  public long number = 0;
+  public final long number;
   
   /**
    * Constructor to create a new bank account.