diff --git a/scripts/appendJsonSerializeCode.pl b/scripts/appendJsonSerializeCode.pl
index 967ca838..7eb2ade1 100644
--- a/scripts/appendJsonSerializeCode.pl
+++ b/scripts/appendJsonSerializeCode.pl
@@ -13,7 +13,13 @@
     my $filepath = "lib/net/authorize/api/contract/v1/";
     my $filename = "$filepath"."$_";
     my $text = `cat $filename`;
-    my $sub = `cat scripts/appendJsonSerializeCode.txt`;
+    my $sub = "";
+
+    if ($text =~ /(?^pm:\nclass \w+ extends )/) {
+        $sub = `cat scripts/appendJsonSerializeSubClassCode.txt`;
+    } else {
+        $sub = `cat scripts/appendJsonSerializeCode.txt`;
+    }
 
     $text =~ s|(.+)}|$1$sub|xms;
 
diff --git a/scripts/appendJsonSerializeCode.txt b/scripts/appendJsonSerializeCode.txt
index 9b849b7c..a01f6814 100755
--- a/scripts/appendJsonSerializeCode.txt
+++ b/scripts/appendJsonSerializeCode.txt
@@ -25,12 +25,7 @@
                 }
             }
         }
-        if (get_parent_class() == ""){
-            return $values;
-        }
-        else{
-            return array_merge(parent::jsonSerialize(), $values);
-        }
+        return $values;
     }
     
 }
\ No newline at end of file
diff --git a/scripts/appendJsonSerializeSubClassCode.txt b/scripts/appendJsonSerializeSubClassCode.txt
new file mode 100644
index 00000000..1fa0379a
--- /dev/null
+++ b/scripts/appendJsonSerializeSubClassCode.txt
@@ -0,0 +1,31 @@
+    // Json Serialize Code
+    public function jsonSerialize(){
+        $values = array_filter((array)get_object_vars($this),
+        function ($val){
+            return !is_null($val);
+        });
+        $mapper = \net\authorize\util\Mapper::Instance();
+        foreach($values as $key => $value){
+            $classDetails = $mapper->getClass(get_class() , $key);
+            if (isset($value)){
+                if ($classDetails->className === 'Date'){
+                    $dateTime = $value->format('Y-m-d');
+                    $values[$key] = $dateTime;
+                }
+                else if ($classDetails->className === 'DateTime'){
+                    $dateTime = $value->format('Y-m-d\TH:i:s\Z');
+                    $values[$key] = $dateTime;
+                }
+                if (is_array($value)){
+                    if (!$classDetails->isInlineArray){
+                        $subKey = $classDetails->arrayEntryname;
+                        $subArray = [$subKey => $value];
+                        $values[$key] = $subArray;
+                    }
+                }
+            }
+        }
+        return array_merge(parent::jsonSerialize(), $values);
+    }
+
+}
\ No newline at end of file