Type error with sync

mysql.ts

import { Sequelize, ISequelizeConfig } from 'sequelize-typescript';

let configOpts: ISequelizeConfig = {
  name: 'hawtdb',
  dialect: 'mysql',
  username: 'hawtuser',
  password: 'hawrtpassl3377',
  host: 'localhost',
  port: 3306,
  pool: {
    max: 1000,
    min: 0,
    idle: 5000
  },
  modelPaths: [__dirname + '/models/entities/']
};

const sequelize = new Sequelize(configOpts);

// establish singleton instance for application
app.set('sequelizeClient', sequelize);

// type error here
sequelize.sync({alter: true});