Express starter unable to use VPC

I tried to add VPC to my express-starter serverless.yml
vpc:
securityGroupIds:
sg-abcde
subnetIds:
subnet-a12344
subnet-a23456
but with error: "Serverless › Invalid Input: “vpc” is not allowed "
I checked the source code for express-starter,


in util.js, it does get the inputs.vpc however, it doesn’t work. is Serverless.com using the latest version of express-start?