diff --git a/src/cloudformation_cli_python_lib/utils.py b/src/cloudformation_cli_python_lib/utils.py
index 2b42720d..117a40af 100644
--- a/src/cloudformation_cli_python_lib/utils.py
+++ b/src/cloudformation_cli_python_lib/utils.py
@@ -85,8 +85,8 @@ class HandlerRequest:
     awsAccountId: str
     bearerToken: str
     region: str
-    responseEndpoint: str
     requestData: RequestData
+    responseEndpoint: Optional[str] = None
     stackId: Optional[str] = None
     resourceType: Optional[str] = None
     resourceTypeVersion: Optional[str] = None
diff --git a/src/setup.py b/src/setup.py
index 8911f068..941f3b67 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -3,7 +3,7 @@
 
 setup(
     name="cloudformation-cli-python-lib",
-    version="2.1.1",
+    version="2.1.2",
     description=__doc__,
     author="Amazon Web Services",
     author_email="aws-cloudformation-developers@amazon.com",