MongoDB NodeJS Driver 5.1.0 Released

The MongoDB Node.js team is pleased to announce version 5.1.0 of the mongodb package!

Release Highlights

Support for JavaScript bigints in the driver

The driver now supports automatic serialization of JavaScript bigints to BSON.Longs. It also supports deserializing of BSON.Long values returned from the server to bigint values when the useBigInt64 flag is passed as true.

import { MongoClient } from 'mongodb';

(async () => {
  const client = new MongoClient('<YOUR CONNECTION STRING>');
  const db = client.db('test');
  const coll = db.collection('bigints');

  await coll.insertOne({ a: 10n }); // The driver automatically serializes bigints to BSON.Long before being sent to the server

  const docBigInt = await coll.findOne({ a: 10n }, { useBigInt64: true }); // Must provide the useBigInt64 flag to specify that bigints get returned
  // { _id: ObjectId(...), a: 10n }
  const doc = await coll.findOne({ a: 10n }); // Must provide the useBigInt64 flag to specify that bigints get returned
  // { _id: ObjectId(...), a: 10 }
  await client.close();


  • NODE-3445: add support for AssumeRoleWithWebIdentity in aws authentication (#3556) (e8a30b1)
  • NODE-4877: Add support for useBigInt64 (#3519) (917668c)
  • NODE-5050: support GCP automatic credential fetch for CSFLE (#3574) (722a4a6)

Bug Fixes

  • NODE-5044: Write Concern 0 Must Not Affect Read Operations (#3541) (#3575) (10146a4)
  • NODE-5052: prevent cursor and changestream close logic from running more than once (#3562) (71d0d79)
  • NODE-5064: consolidate connection cleanup logic and ensure socket is always closed (#3572) (e544d88)


We invite you to try the mongodb library immediately, and report any issues to the NODE project.

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