Facing error on declaring authorizer to http event in aws-nodejs-typescript

I am using the aws-nodejs-typescript template
I want to do something like this

functions:
  verify-token:
    handler: auth/VerifyToken.auth
  profile:
    handler: auth/AuthHandler.profile
    events:
      - http:
          path: me
          method: get
          cors: true
          authorizer: verify-token

So i write following -

functions: {
    verify_token: {
      handler: 'auth/VerifyToken.auth'
    },
    profile: {
      handler: 'auth/AuthHandler.profile',
      events: [
        {
          http: {
            method: 'get',
            path: 'persons/profile',
            cors: true,
            authorizer: 'verify_token'
          }
        }
      ]
    }

But this gives me TS error as Type 'string' has no properties in common with type 'HttpAuthorizer'.

Can you please help?