diff --git a/apns.py b/apns.py
old mode 100644
new mode 100755
index 33655b1..532053b
--- a/apns.py
+++ b/apns.py
@@ -267,37 +267,44 @@ def write(self, string):
             return self._connection().write(string)
 
 
-class PayloadAlert(object):
-    def __init__(self, body=None, title = None, subtitle = None, action_loc_key=None, loc_key=None,
-                 loc_args=None, launch_image=None):
-        super(PayloadAlert, self).__init__()
-        
-        self.body = body
-        self.title = title
-        self.subtitle = subtitle
-        self.action_loc_key = action_loc_key
-        self.loc_key = loc_key
-        self.loc_args = loc_args
-        self.launch_image = launch_image
+class PayloadAlert(dict):
+    """
+    Payload for APNS alert.
+    https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html
+    """
+    def __init__(self,
+                 body=None,
+                 title=None,
+                 subtitle=None,
+                 action_loc_key=None,
+                 loc_key=None,
+                 loc_args=None,
+                 launch_image=None,
+                 title_loc_key=None,
+                 title_loc_args=None):
+        dict_ = {
+            'body': body,
+            'title': title,
+            'subtitle': subtitle,
+            'action-loc-key': action_loc_key,
+            'loc-key': loc_key,
+            'loc-args': loc_args,
+            'launch-image': launch_image,
+            'title-loc-key': title_loc_key,
+            'title-loc-args': title_loc_args
+        }
+
+        # init dictionary with non None items
+        super(PayloadAlert, self).__init__(
+            {
+                key: value for (key, value)
+                in dict_.items() if value is not None
+            }
+        )
 
     def dict(self):
-        d = {}
-        
-        if self.body:
-            d['body'] = self.body
-        if self.title:
-            d['title'] = self.title
-        if self.subtitle:
-            d['subtitle'] = self.subtitle
-        if self.action_loc_key:
-            d['action-loc-key'] = self.action_loc_key
-        if self.loc_key:
-            d['loc-key'] = self.loc_key
-        if self.loc_args:
-            d['loc-args'] = self.loc_args
-        if self.launch_image:
-            d['launch-image'] = self.launch_image
-        return d
+        return self
+
 
 class PayloadTooLargeError(Exception):
     def __init__(self, payload_size):
diff --git a/setup.py b/setup.py
index 1d66940..644ff24 100644
--- a/setup.py
+++ b/setup.py
@@ -10,5 +10,5 @@
     py_modules = ['apns'],
     scripts = ['apns-send'],
     url = 'http://29.io/',
-    version = '2.0.1',
+    version = 'canwehatch.2.0.2',
 )
diff --git a/tests.py b/tests.py
old mode 100644
new mode 100755
index fb17a54..6a6254c
--- a/tests.py
+++ b/tests.py
@@ -5,6 +5,7 @@
 from random import random
 
 import hashlib
+import json
 import os
 import time
 import unittest
@@ -130,6 +131,11 @@ def testPayloadAlert(self):
         self.assertTrue('body' not in d)
         self.assertEqual(d['loc-key'], 'wibble')
 
+    def testPayloadAlertJSONSerializable(self):
+        pa = PayloadAlert('foo', action_loc_key='bar', loc_key='wibble',
+                          loc_args=['king', 'kong'], launch_image='wobble')
+        self.assertEqual(pa, json.loads(json.dumps(pa)))
+
     def testPayload(self):
         # Payload with just alert
         p = Payload(alert=PayloadAlert('foo'))
@@ -188,9 +194,19 @@ def testFrame(self):
         frame = Frame()
         frame.add_item(token_hex, payload, identifier, expiry, priority)
 
-        f1 = bytearray(b'\x02\x00\x00\x00t\x01\x00 \xb5\xbb\x9d\x80\x14\xa0\xf9\xb1\xd6\x1e!\xe7\x96\xd7\x8d\xcc\xdf\x13R\xf2<\xd3(\x12\xf4\x85\x0b\x87\x8a\xe4\x94L\x02\x00<{"aps":{"sound":"default","badge":4,"alert":"Hello World!"}}\x03\x00\x04\x00\x00\x00\x01\x04\x00\x04\x00\x00\x0e\x10\x05\x00\x01\n')
-        f2 = bytearray(b'\x02\x00\x00\x00t\x01\x00 \xb5\xbb\x9d\x80\x14\xa0\xf9\xb1\xd6\x1e!\xe7\x96\xd7\x8d\xcc\xdf\x13R\xf2<\xd3(\x12\xf4\x85\x0b\x87\x8a\xe4\x94L\x02\x00<{"aps":{"sound":"default","alert":"Hello World!","badge":4}}\x03\x00\x04\x00\x00\x00\x01\x04\x00\x04\x00\x00\x0e\x10\x05\x00\x01\n')
-        self.assertTrue(f1 == frame.get_frame() or f2 == frame.get_frame())
+        frame_bytes = frame.get_frame()
+
+        prefix = frame_bytes[:43]
+        data = frame_bytes[43: -18]
+        postfix = frame_bytes[-18:]
+
+        self.assertEqual(prefix, b'\x02\x00\x00\x00t\x01\x00 \xb5\xbb\x9d\x80\x14\xa0\xf9\xb1\xd6\x1e!\xe7\x96\xd7\x8d\xcc\xdf\x13R\xf2<\xd3(\x12\xf4\x85\x0b\x87\x8a\xe4\x94L\x02\x00<')
+        self.assertEqual(
+            json.loads(data.decode()),
+            json.loads('{"aps":{"sound":"default","badge":4,'
+                       '"alert":"Hello World!"}}')
+        )
+        self.assertEqual(postfix, b'\x03\x00\x04\x00\x00\x00\x01\x04\x00\x04\x00\x00\x0e\x10\x05\x00\x01\n')
 
     def testPayloadTooLargeError(self):
         # The maximum size of the JSON payload is MAX_PAYLOAD_LENGTH 
@@ -209,5 +225,6 @@ def testPayloadTooLargeError(self):
         self.assertRaises(PayloadTooLargeError, Payload,
             u'\u0100' * (int(max_raw_payload_bytes / 2) + 1))
 
+
 if __name__ == '__main__':
     unittest.main()