diff --git a/stacks/handlers_stack.py b/stacks/handlers_stack.py
index da0f6fb9..a36fc91e 100644
--- a/stacks/handlers_stack.py
+++ b/stacks/handlers_stack.py
@@ -93,9 +93,9 @@ def endpoint(self):
             )
         )
 
-        # self.api.add_api_handler(
-        #     "CloudFormation", lambda_invoked_by_apigw_cloudformation, "/CloudFormation"
-        # )
+        self.api.add_api_handler(
+            "CloudFormation", lambda_invoked_by_apigw_cloudformation, "/CloudFormation"
+        )
 
     def eval_engine(self):
 
diff --git a/supplementary_files/lambdas_handlers_stack/invoked_by_apigw_cloudformation/lambda_function.py b/supplementary_files/lambdas_handlers_stack/invoked_by_apigw_cloudformation/lambda_function.py
index 608deb16..18770585 100644
--- a/supplementary_files/lambdas_handlers_stack/invoked_by_apigw_cloudformation/lambda_function.py
+++ b/supplementary_files/lambdas_handlers_stack/invoked_by_apigw_cloudformation/lambda_function.py
@@ -19,7 +19,7 @@ def generate_uuid():
     
     return s3_uri
 
-def invoke_lambda_async(*,function_name,payload):
+def invoke_lambda_async(*,function_name,payload:dict):
 
     try:
         r = lambda_.invoke(
@@ -27,7 +27,7 @@ def invoke_lambda_async(*,function_name,payload):
             InvocationType='Event',
             # LogType='None'|'Tail',
             # ClientContext='string',
-            Payload=payload,
+            Payload=bytes(payload),
         )
     except ClientError as e:
         print(f'ClientError:\n{e}')