diff --git a/src/difflib/DeltaComparator.java b/src/difflib/DeltaComparator.java
index 569aae8..8ee3be1 100644
--- a/src/difflib/DeltaComparator.java
+++ b/src/difflib/DeltaComparator.java
@@ -7,13 +7,13 @@ import java.util.Comparator;
  * @author mksenzov
  */
 public class DeltaComparator implements Comparator<Delta>, Serializable {
-
+    private static final long serialVersionUID = 1L;
     public static final Comparator<Delta> INSTANCE = new DeltaComparator();
 
     private DeltaComparator() {
     }
 
     public int compare(final Delta a, final Delta b) {
-        return new Integer(a.getOriginal().getPosition()).compareTo(b.getOriginal().getPosition());
+        return Integer.valueOf(a.getOriginal().getPosition()).compareTo(b.getOriginal().getPosition());
     }
 }
\ No newline at end of file