Deprecation Warning

I’m getting this warning

(node:3341) DeprecationWarning: Mongoose: mpromise (mongoose's default promise library) is deprecated, plug in your own promise library instead: http://mongoosejs.com/docs/promises.html

after I do

driver.createCar({
          carName: 'jeep',
          availableSeats: 4,
        }, callback);

driver is an instance of Driver class

const carSchema = new Schema({
  carName: String,
  availableSeats: Number,
  createdOn: { type: Date, default: Date.now },
});
const driverSchema = new Schema({
  email: String,
  name: String,
  city: String,
  phoneNumber: String,
  cars: [carSchema],
  userId: {
    type: Schema.Types.ObjectId,
    required: true,
  },
  createdOn: { type: Date, default: Date.now },
});
const DriverModel = mongoose.model('Driver', driverSchema);

class Driver extends DriverModel {
  getCurrentDate() {
    return moment().format();
  }
  create(cb) {
    // save driver
    this.createdOn = this.getCurrentDate();
    this.save(cb);
  }
  remove(cb) {
    super.remove({
      _id: this._id,
    }, cb);
  }
  createCar(carData, cb) {
    this.cars.push(carData);
    this.save(cb);
  }
  getCars() {
    return this.cars;
  }
}

any thoughts about what Im doing wrong?

[saudelog]

I solved that warning doing

mongoose.Promise = global.Promise;

Right before calling mongoose.connect

// connect to mongo function
core.connect = function connect(opts) {
  mongoose.Promise = global.Promise;
  mongoose.connect(`mongodb://${opts.server}:${opts.port}/${opts.db}`);
  return mongoose.connection;
};

[OpakAlex]

So stupid issue!