@@ -458,7 +458,7 @@ def create_or_update_target_group(connection, module):

                     instances_to_add = []

                     for target in params['Targets']:

                         if target['Id'] in add_instances:

-                            instances_to_add.append(target)

+                            instances_to_add.append({'Id': target['Id'], 'Port': int(target['Port'])})

                     changed = True

                     try: