AWS::SecretsManager::RotationSchedule ko

Serverless Framework
1

I’m trying to implement aws secrets rotation using the serverless framework (Adding hosted secrets rotation Lambda to an RDS stack | Alex Harvey)

  AppGraphqDbAppsSecretRotationSchedule:
    Type: AWS::SecretsManager::RotationSchedule
    Properties:
      SecretId: !Ref AppGraphqlDbAppsSecretsManagerSecret
      HostedRotationLambda:
        RotationType: PostgreSQLSingleUser
      RotationRules:
        AutomaticallyAfterDays: 30

But I get the error

 To use the HostedRotationLambda property, you must use the AWS::SecretsManager transform.

Probably I need to add “Transform: AWS::SecretsManager-2020-07-23” somewhere: where?

Below a working Aws Cloudformation template

AWSTemplateFormatVersion: 2010-09-09
Description: Rotation Lambda example stack
Transform: AWS::SecretsManager-2020-07-23

Parameters: {}

Resources: