Kong Mocking plugin custom response headers

Hello, can I use Mocking plugin to return custom headers?
I tried it out but did not succeed.
I specified headers in the openapi specification like below but never received StudyId headers in response.

openapi: 3.0.3
info:
  title: mock
  description: This API is intended to 
  contact:
    email: mock@mail.com
  version: 1.0.0
servers:
  - url: https://dummy-apispec.com
tags:
  - name: Data
paths:
  /ping:
    get:
      responses:
        '200':
          headers:
            StudyId:
              schema:
                type: string
                example: studyId1
          content:
            application/json:
              example:
                message: 'hello'