Mongod is not a constructor

[xndyz]

Looks like the module is not working. When I do:

import * as Koa from 'koa'
import * as Router from 'koa-router'
import * as next from 'next'
import * as mongoose from 'mongoose'
import Mongod from 'mongod'

const port = parseInt(process.env.PORT, 10) || 3000
const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app.prepare()
.then(async () => {
  await new Mongod(27017).open()
  mongoose.connect('mongodb://localhost:27017/local')

I get this error:

(node:59616) UnhandledPromiseRejectionWarning: TypeError: mongod_1.Mongod is not a constructor
    at app.prepare.then (/Users/fang/Documents/community/server/index.ts:14:5)
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:228:7)
(node:59616) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without
 a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:59616) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will term
inate the Node.js process with a non-zero exit code.