diff --git a/awsiot/__init__.py b/awsiot/__init__.py
index accc4c46..2941e658 100644
--- a/awsiot/__init__.py
+++ b/awsiot/__init__.py
@@ -15,7 +15,7 @@
 import json
 from typing import Any, Callable, Dict, Optional, Tuple, TypeVar
 
-__version__ = '1.0.0-dev'
+__version__ = '1.0.1-dev'
 
 T = TypeVar('T')
 
diff --git a/awsiot/iotshadow.py b/awsiot/iotshadow.py
index eddc8bd0..3704c81b 100644
--- a/awsiot/iotshadow.py
+++ b/awsiot/iotshadow.py
@@ -1191,16 +1191,17 @@ class ShadowDeltaUpdatedEvent(awsiot.ModeledClass):
         version (int): The current version of the document for the device's shadow.
     """
 
-    __slots__ = ['metadata', 'state', 'timestamp', 'version']
+    __slots__ = ['metadata', 'state', 'timestamp', 'version', 'client_token']
 
     def __init__(self, *args, **kwargs):
         self.metadata = kwargs.get('metadata')
         self.state = kwargs.get('state')
         self.timestamp = kwargs.get('timestamp')
         self.version = kwargs.get('version')
+        self.client_token = kwargs.get('client_token')
 
         # for backwards compatibility, read any arguments that used to be accepted by position
-        for key, val in zip(['metadata', 'state', 'timestamp', 'version'], args):
+        for key, val in zip(['metadata', 'state', 'timestamp', 'version', 'client_token'], args):
             setattr(self, key, val)
 
     @classmethod
@@ -1219,6 +1220,9 @@ def from_payload(cls, payload):
         val = payload.get('version')
         if val is not None:
             new.version = val
+        val = payload.get('clientToken')
+        if val is not None:
+            new.client_token = val
         return new
 
 class ShadowDeltaUpdatedSubscriptionRequest(awsiot.ModeledClass):