diff --git a/JSONArray.java b/JSONArray.java
index 673a91927..e0028b35e 100644
--- a/JSONArray.java
+++ b/JSONArray.java
@@ -77,7 +77,7 @@ of this software and associated documentation files (the "Software"), to deal
  * @author JSON.org
  * @version 2013-04-18
  */
-public class JSONArray {
+public class JSONArray implements java.io.Serializable {
 
     /**
      * The arrayList where the JSONArray's properties are kept.
diff --git a/JSONObject.java b/JSONObject.java
index 5ca5a45bc..d03aabaa5 100755
--- a/JSONObject.java
+++ b/JSONObject.java
@@ -92,7 +92,7 @@ of this software and associated documentation files (the "Software"), to deal
  * @author JSON.org
  * @version 2013-06-17
  */
-public class JSONObject {
+public class JSONObject implements java.io.Serializable {
     /**
      * JSONObject.NULL is equivalent to the value that JavaScript calls null,
      * whilst Java's null is equivalent to the value that JavaScript calls