diff --git a/ContactList.java b/ContactList.java
index 34bf5ab510aac85aff77dee34bec1107dc7e8448..921685af89a4eacc6d56e4e8700dfb0fb4078d10 100644
--- a/ContactList.java
+++ b/ContactList.java
@@ -1,10 +1,10 @@
 import java.util.ArrayList;
+import java.util.List;
 import java.io.Serializable;
 
 class ContactList implements Serializable
 {
-    //private Contact[] contacts = {};
-    private ArrayList<Contact> contacts = new ArrayList<>();
+    private List<Contact> contacts = new ArrayList<>();
     private static final long serialVersionUID = 1234567890L;
 
     public ContactList(){}