diff --git a/src/DataTypes.java b/src/DataTypes.java
index 4f807c1f..b40f5fdb 100644
--- a/src/DataTypes.java
+++ b/src/DataTypes.java
@@ -1,12 +1,11 @@
 import java.util.List;
 
 public class DataTypes {
-    // TODO TASK 1: fix this code so that it passes the test in DataTypesTest.java
     public static long sum(List<Integer> numbers) {
 
-        int s = 0;
+        long s = 0;
         // below is a "foreach" loop which iterates through numbers
-        for (int x : numbers) {
+        for (long x : numbers) {
             s += x;
         }
         return s;