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Hi there! What version of `pulumi-aws` are you using? I've got `pulumi-aws&gt;=5.0.0,&lt;6.0.0` in my `requirements.txt`, and the code in that example seems to work for me without modification:
```Previewing update (dev)

     Type                        Name                    Plan       
 +   pulumi:pulumi:Stack         aws-eks-dev             create     
 +   ├─ aws:rds:Cluster          exampleCluster          create     
 +   └─ aws:rds:ClusterInstance  exampleClusterInstance  create     

Resources:
    + 3 to create```
The input arguments are a little hard to find on the page, but they're there, linked from the `serverlessv2_scaling_configuration` input: <https://www.pulumi.com/registry/packages/aws/api-docs/rds/cluster/#serverlessv2_scaling_configuration_python>

Also seems to deploy as well, so my guess is that maybe you're on an older version?

My `dockerfile_requirements.txt` file has the following entry:
`pulumi_aws==5.1.1`

Yeah looks like I'm on 5.41 (latest), so that might be the issue.

Yes, it is. Thanks. Upgrading to 5.4.1 solved the issue.