diff --git a/libraries/object-persistor/src/FSPersistor.js b/libraries/object-persistor/src/FSPersistor.js
index cdccb8fd5e..853665630b 100644
--- a/libraries/object-persistor/src/FSPersistor.js
+++ b/libraries/object-persistor/src/FSPersistor.js
@@ -1,19 +1,16 @@
 const fs = require('fs')
-const glob = require('glob')
+const fsPromises = require('fs/promises')
+const globCallbacks = require('glob')
 const uuid = require('node-uuid')
 const path = require('path')
-const Stream = require('stream')
+const { pipeline } = require('stream/promises')
 const { promisify } = require('util')
 
 const AbstractPersistor = require('./AbstractPersistor')
 const { NotFoundError, ReadError, WriteError } = require('./Errors')
 const PersistorHelper = require('./PersistorHelper')
 
-const pipeline = promisify(Stream.pipeline)
-const fsUnlink = promisify(fs.unlink)
-const fsOpen = promisify(fs.open)
-const fsStat = promisify(fs.stat)
-const fsGlob = promisify(glob)
+const glob = promisify(globCallbacks)
 
 const filterName = key => key.replace(/\//g, '_')
 
@@ -72,7 +69,7 @@ module.exports = class FSPersistor extends AbstractPersistor {
     const filteredName = filterName(name)
 
     try {
-      opts.fd = await fsOpen(`${location}/${filteredName}`, 'r')
+      opts.fd = await fsPromises.open(`${location}/${filteredName}`, 'r')
     } catch (err) {
       throw PersistorHelper.wrapError(
         err,
@@ -94,7 +91,7 @@ module.exports = class FSPersistor extends AbstractPersistor {
     const fullPath = path.join(location, filterName(filename))
 
     try {
-      const stat = await fsStat(fullPath)
+      const stat = await fsPromises.stat(fullPath)
       return stat.size
     } catch (err) {
       throw PersistorHelper.wrapError(
@@ -142,7 +139,7 @@ module.exports = class FSPersistor extends AbstractPersistor {
   async deleteObject(location, name) {
     const filteredName = filterName(name)
     try {
-      await fsUnlink(`${location}/${filteredName}`)
+      await fsPromises.unlink(`${location}/${filteredName}`)
     } catch (err) {
       const wrappedError = PersistorHelper.wrapError(
         err,
@@ -164,8 +161,8 @@ module.exports = class FSPersistor extends AbstractPersistor {
     try {
       await Promise.all(
         (
-          await fsGlob(`${location}/${filteredName}_*`)
-        ).map(file => fsUnlink(file))
+          await glob(`${location}/${filteredName}_*`)
+        ).map(file => fsPromises.unlink(file))
       )
     } catch (err) {
       throw PersistorHelper.wrapError(
@@ -180,7 +177,7 @@ module.exports = class FSPersistor extends AbstractPersistor {
   async checkIfObjectExists(location, name) {
     const filteredName = filterName(name)
     try {
-      const stat = await fsStat(`${location}/${filteredName}`)
+      const stat = await fsPromises.stat(`${location}/${filteredName}`)
       return !!stat
     } catch (err) {
       if (err.code === 'ENOENT') {
@@ -201,10 +198,10 @@ module.exports = class FSPersistor extends AbstractPersistor {
     let size = 0
 
     try {
-      const files = await fsGlob(`${location}/${filteredName}_*`)
+      const files = await glob(`${location}/${filteredName}_*`)
       for (const file of files) {
         try {
-          const stat = await fsStat(file)
+          const stat = await fsPromises.stat(file)
           if (stat.isFile()) {
             size += stat.size
           }
@@ -261,7 +258,7 @@ module.exports = class FSPersistor extends AbstractPersistor {
       return
     }
     try {
-      await fsUnlink(fsPath)
+      await fsPromises.unlink(fsPath)
     } catch (err) {
       if (err.code !== 'ENOENT') {
         throw new WriteError('failed to delete file', { fsPath }, err)
diff --git a/libraries/object-persistor/src/GcsPersistor.js b/libraries/object-persistor/src/GcsPersistor.js
index 2cf1e1afd0..98b3c157b4 100644
--- a/libraries/object-persistor/src/GcsPersistor.js
+++ b/libraries/object-persistor/src/GcsPersistor.js
@@ -1,14 +1,11 @@
 const fs = require('fs')
-const { promisify } = require('util')
-const Stream = require('stream')
+const { pipeline } = require('stream/promises')
 const { Storage } = require('@google-cloud/storage')
 const { WriteError, ReadError, NotFoundError } = require('./Errors')
 const asyncPool = require('tiny-async-pool')
 const AbstractPersistor = require('./AbstractPersistor')
 const PersistorHelper = require('./PersistorHelper')
 
-const pipeline = promisify(Stream.pipeline)
-
 module.exports = class GcsPersistor extends AbstractPersistor {
   constructor(settings) {
     super()
diff --git a/libraries/object-persistor/src/MigrationPersistor.js b/libraries/object-persistor/src/MigrationPersistor.js
index 0b476e46cc..17dd9d314d 100644
--- a/libraries/object-persistor/src/MigrationPersistor.js
+++ b/libraries/object-persistor/src/MigrationPersistor.js
@@ -1,11 +1,9 @@
 const AbstractPersistor = require('./AbstractPersistor')
 const Logger = require('@overleaf/logger')
 const Stream = require('stream')
-const { promisify } = require('util')
+const { pipeline } = require('stream/promises')
 const { NotFoundError, WriteError } = require('./Errors')
 
-const pipeline = promisify(Stream.pipeline)
-
 // Persistor that wraps two other persistors. Talks to the 'primary' by default,
 // but will fall back to an older persistor in the case of a not-found error.
 // If `Settings.fallback.copyOnMiss` is set, this will copy files from the fallback
diff --git a/libraries/object-persistor/src/PersistorHelper.js b/libraries/object-persistor/src/PersistorHelper.js
index fae348d274..5079ebcceb 100644
--- a/libraries/object-persistor/src/PersistorHelper.js
+++ b/libraries/object-persistor/src/PersistorHelper.js
@@ -1,10 +1,8 @@
 const Crypto = require('crypto')
 const Stream = require('stream')
+const { pipeline } = require('stream/promises')
 const Logger = require('@overleaf/logger')
 const { WriteError, ReadError, NotFoundError } = require('./Errors')
-const { promisify } = require('util')
-
-const pipeline = promisify(Stream.pipeline)
 
 // Observes data that passes through and computes some metadata for it
 // - specifically, it computes the number of bytes transferred, and optionally
diff --git a/libraries/object-persistor/test/unit/FSPersistorTests.js b/libraries/object-persistor/test/unit/FSPersistorTests.js
index 4697275d97..2f560f52fc 100644
--- a/libraries/object-persistor/test/unit/FSPersistorTests.js
+++ b/libraries/object-persistor/test/unit/FSPersistorTests.js
@@ -5,7 +5,7 @@ const SandboxedModule = require('sandboxed-module')
 const Errors = require('../../src/Errors')
 const StreamModule = require('stream')
 
-const modulePath = '../../src/FSPersistor.js'
+const MODULE_PATH = '../../src/FSPersistor.js'
 
 describe('FSPersistorTests', function () {
   const stat = { size: 4, isFile: sinon.stub().returns(true) }
@@ -19,7 +19,17 @@ describe('FSPersistorTests', function () {
   const files = ['animals/wombat.tex', 'vegetables/potato.tex']
   const globs = [`${location}/${files[0]}`, `${location}/${files[1]}`]
   const filteredFilenames = ['animals_wombat.tex', 'vegetables_potato.tex']
-  let fs, stream, FSPersistor, glob, readStream, crypto, Hash, uuid, tempFile
+  let fs,
+    fsPromises,
+    Stream,
+    StreamPromises,
+    FSPersistor,
+    glob,
+    readStream,
+    crypto,
+    Hash,
+    uuid,
+    tempFile
 
   beforeEach(function () {
     const randomNumber = Math.random().toString()
@@ -35,15 +45,19 @@ describe('FSPersistorTests', function () {
     fs = {
       createReadStream: sinon.stub().returns(readStream),
       createWriteStream: sinon.stub().returns(writeStream),
-      unlink: sinon.stub().yields(),
-      open: sinon.stub().yields(null, fd),
-      stat: sinon.stub().yields(null, stat),
+    }
+    fsPromises = {
+      unlink: sinon.stub().resolves(),
+      open: sinon.stub().resolves(fd),
+      stat: sinon.stub().resolves(stat),
     }
     glob = sinon.stub().yields(null, globs)
-    stream = {
-      pipeline: sinon.stub().yields(),
+    Stream = {
       Transform: StreamModule.Transform,
     }
+    StreamPromises = {
+      pipeline: sinon.stub().resolves(),
+    }
     Hash = {
       end: sinon.stub(),
       read: sinon.stub().returns(md5),
@@ -53,12 +67,14 @@ describe('FSPersistorTests', function () {
     crypto = {
       createHash: sinon.stub().returns(Hash),
     }
-    FSPersistor = new (SandboxedModule.require(modulePath, {
+    FSPersistor = new (SandboxedModule.require(MODULE_PATH, {
       requires: {
         './Errors': Errors,
         fs,
+        'fs/promises': fsPromises,
         glob,
-        stream,
+        stream: Stream,
+        'stream/promises': StreamPromises,
         crypto,
         'node-uuid': uuid,
         // imported by PersistorHelper but otherwise unused here
@@ -76,11 +92,14 @@ describe('FSPersistorTests', function () {
       expect(fs.createWriteStream).to.have.been.calledWith(
         `${location}/${filteredFilenames[0]}`
       )
-      expect(stream.pipeline).to.have.been.calledWith(readStream, writeStream)
+      expect(StreamPromises.pipeline).to.have.been.calledWith(
+        readStream,
+        writeStream
+      )
     })
 
     it('should return an error if the file cannot be stored', async function () {
-      stream.pipeline.yields(error)
+      StreamPromises.pipeline.rejects(error)
       await expect(
         FSPersistor.sendFile(location, files[0], localFilesystemPath)
       ).to.eventually.be.rejected.and.have.property('cause', error)
@@ -90,16 +109,19 @@ describe('FSPersistorTests', function () {
   describe('sendStream', function () {
     it('should write the stream to disk', async function () {
       await FSPersistor.sendStream(location, files[0], remoteStream)
-      expect(stream.pipeline).to.have.been.calledWith(remoteStream, writeStream)
+      expect(StreamPromises.pipeline).to.have.been.calledWith(
+        remoteStream,
+        writeStream
+      )
     })
 
     it('should delete the temporary file', async function () {
       await FSPersistor.sendStream(location, files[0], remoteStream)
-      expect(fs.unlink).to.have.been.calledWith(tempFile)
+      expect(fsPromises.unlink).to.have.been.calledWith(tempFile)
     })
 
     it('should wrap the error from the filesystem', async function () {
-      stream.pipeline.yields(error)
+      StreamPromises.pipeline.rejects(error)
       await expect(FSPersistor.sendStream(location, files[0], remoteStream))
         .to.eventually.be.rejected.and.be.instanceOf(Errors.WriteError)
         .and.have.property('cause', error)
@@ -127,7 +149,7 @@ describe('FSPersistorTests', function () {
             sourceMd5: '00000000',
           })
         } catch (_) {}
-        expect(fs.unlink).to.have.been.calledWith(
+        expect(fsPromises.unlink).to.have.been.calledWith(
           `${location}/${filteredFilenames[0]}`
         )
       })
@@ -137,7 +159,7 @@ describe('FSPersistorTests', function () {
   describe('getObjectStream', function () {
     it('should use correct file location', async function () {
       await FSPersistor.getObjectStream(location, files[0], {})
-      expect(fs.open).to.have.been.calledWith(
+      expect(fsPromises.open).to.have.been.calledWith(
         `${location}/${filteredFilenames[0]}`
       )
     })
@@ -157,7 +179,7 @@ describe('FSPersistorTests', function () {
     it('should give a NotFoundError if the file does not exist', async function () {
       const err = new Error()
       err.code = 'ENOENT'
-      fs.open.yields(err)
+      fsPromises.open.rejects(err)
 
       await expect(FSPersistor.getObjectStream(location, files[0], {}))
         .to.eventually.be.rejected.and.be.an.instanceOf(Errors.NotFoundError)
@@ -165,7 +187,7 @@ describe('FSPersistorTests', function () {
     })
 
     it('should wrap any other error', async function () {
-      fs.open.yields(error)
+      fsPromises.open.rejects(error)
       await expect(FSPersistor.getObjectStream(location, files[0], {}))
         .to.eventually.be.rejectedWith('failed to open file for streaming')
         .and.be.an.instanceOf(Errors.ReadError)
@@ -180,12 +202,12 @@ describe('FSPersistorTests', function () {
     noentError.code = 'ENOENT'
 
     beforeEach(function () {
-      fs.stat
-        .yields(error)
+      fsPromises.stat
+        .rejects(error)
         .withArgs(`${location}/${filteredFilenames[0]}`)
-        .yields(null, { size })
+        .resolves({ size })
         .withArgs(`${location}/${badFilename}`)
-        .yields(noentError)
+        .rejects(noentError)
     })
 
     it('should return the file size', async function () {
@@ -222,20 +244,23 @@ describe('FSPersistorTests', function () {
 
     it('Should pipe the source to the target', async function () {
       await FSPersistor.copyObject(location, files[0], files[1])
-      expect(stream.pipeline).to.have.been.calledWith(readStream, writeStream)
+      expect(StreamPromises.pipeline).to.have.been.calledWith(
+        readStream,
+        writeStream
+      )
     })
   })
 
   describe('deleteObject', function () {
     it('Should call unlink with correct options', async function () {
       await FSPersistor.deleteObject(location, files[0])
-      expect(fs.unlink).to.have.been.calledWith(
+      expect(fsPromises.unlink).to.have.been.calledWith(
         `${location}/${filteredFilenames[0]}`
       )
     })
 
     it('Should propagate the error', async function () {
-      fs.unlink.yields(error)
+      fsPromises.unlink.rejects(error)
       await expect(
         FSPersistor.deleteObject(location, files[0])
       ).to.eventually.be.rejected.and.have.property('cause', error)
@@ -253,7 +278,7 @@ describe('FSPersistorTests', function () {
     it('Should call unlink on the returned files', async function () {
       await FSPersistor.deleteDirectory(location, files[0])
       for (const filename of globs) {
-        expect(fs.unlink).to.have.been.calledWith(filename)
+        expect(fsPromises.unlink).to.have.been.calledWith(filename)
       }
     })
 
@@ -271,17 +296,17 @@ describe('FSPersistorTests', function () {
     noentError.code = 'ENOENT'
 
     beforeEach(function () {
-      fs.stat
-        .yields(error)
+      fsPromises.stat
+        .rejects(error)
         .withArgs(`${location}/${filteredFilenames[0]}`)
-        .yields(null, {})
+        .resolves({})
         .withArgs(`${location}/${badFilename}`)
-        .yields(noentError)
+        .rejects(noentError)
     })
 
     it('Should call stat with correct options', async function () {
       await FSPersistor.checkIfObjectExists(location, files[0])
-      expect(fs.stat).to.have.been.calledWith(
+      expect(fsPromises.stat).to.have.been.calledWith(
         `${location}/${filteredFilenames[0]}`
       )
     })
diff --git a/libraries/object-persistor/test/unit/GcsPersistorTests.js b/libraries/object-persistor/test/unit/GcsPersistorTests.js
index f7fc88b9bb..ef385da3bb 100644
--- a/libraries/object-persistor/test/unit/GcsPersistorTests.js
+++ b/libraries/object-persistor/test/unit/GcsPersistorTests.js
@@ -26,6 +26,7 @@ describe('GcsPersistorTests', function () {
     GcsNotFoundError,
     ReadStream,
     Stream,
+    StreamPromises,
     GcsBucket,
     GcsFile,
     GcsPersistor,
@@ -78,10 +79,13 @@ describe('GcsPersistorTests', function () {
     }
 
     Stream = {
-      pipeline: sinon.stub().yields(),
       Transform,
     }
 
+    StreamPromises = {
+      pipeline: sinon.stub().resolves(),
+    }
+
     GcsFile = {
       delete: sinon.stub().resolves(),
       createReadStream: sinon.stub().returns(ReadStream),
@@ -136,6 +140,7 @@ describe('GcsPersistorTests', function () {
         './Errors': Errors,
         fs: Fs,
         stream: Stream,
+        'stream/promises': StreamPromises,
         crypto,
       },
       globals: { console, Buffer },
@@ -373,7 +378,7 @@ describe('GcsPersistorTests', function () {
       })
 
       it('should meter the stream and pass it to GCS', function () {
-        expect(Stream.pipeline).to.have.been.calledWith(
+        expect(StreamPromises.pipeline).to.have.been.calledWith(
           ReadStream,
           sinon.match.instanceOf(Transform),
           WriteStream
@@ -433,14 +438,9 @@ describe('GcsPersistorTests', function () {
     describe('when the upload fails', function () {
       let error
       beforeEach(async function () {
-        Stream.pipeline
-          .withArgs(
-            ReadStream,
-            sinon.match.instanceOf(Transform),
-            WriteStream,
-            sinon.match.any
-          )
-          .yields(genericError)
+        StreamPromises.pipeline
+          .withArgs(ReadStream, sinon.match.instanceOf(Transform), WriteStream)
+          .rejects(genericError)
         try {
           await GcsPersistor.sendStream(bucket, key, ReadStream)
         } catch (err) {
@@ -475,7 +475,7 @@ describe('GcsPersistorTests', function () {
       })
 
       it('should upload the stream via the meter', function () {
-        expect(Stream.pipeline).to.have.been.calledWith(
+        expect(StreamPromises.pipeline).to.have.been.calledWith(
           ReadStream,
           sinon.match.instanceOf(Transform),
           WriteStream
diff --git a/libraries/object-persistor/test/unit/MigrationPersistorTests.js b/libraries/object-persistor/test/unit/MigrationPersistorTests.js
index b3063487fd..48972e96f7 100644
--- a/libraries/object-persistor/test/unit/MigrationPersistorTests.js
+++ b/libraries/object-persistor/test/unit/MigrationPersistorTests.js
@@ -23,7 +23,13 @@ describe('MigrationPersistorTests', function () {
   const size = 33
   const md5 = 'ffffffff'
 
-  let Settings, Logger, Stream, MigrationPersistor, fileStream, newPersistor
+  let Settings,
+    Logger,
+    Stream,
+    StreamPromises,
+    MigrationPersistor,
+    fileStream,
+    newPersistor
 
   beforeEach(function () {
     fileStream = {
@@ -64,10 +70,13 @@ describe('MigrationPersistorTests', function () {
     }
 
     Stream = {
-      pipeline: sinon.stub().yields(),
       PassThrough: sinon.stub(),
     }
 
+    StreamPromises = {
+      pipeline: sinon.stub().resolves(),
+    }
+
     Logger = {
       warn: sinon.stub(),
     }
@@ -75,6 +84,7 @@ describe('MigrationPersistorTests', function () {
     MigrationPersistor = SandboxedModule.require(modulePath, {
       requires: {
         stream: Stream,
+        'stream/promises': StreamPromises,
         './Errors': Errors,
         '@overleaf/logger': Logger,
       },
diff --git a/libraries/object-persistor/test/unit/PersistorFactoryTests.js b/libraries/object-persistor/test/unit/PersistorFactoryTests.js
index 8add51dbc6..52de049a42 100644
--- a/libraries/object-persistor/test/unit/PersistorFactoryTests.js
+++ b/libraries/object-persistor/test/unit/PersistorFactoryTests.js
@@ -1,8 +1,9 @@
 const chai = require('chai')
 const { expect } = chai
 const SandboxedModule = require('sandboxed-module')
+const StreamPromises = require('stream/promises')
 
-const modulePath = '../../src/PersistorFactory.js'
+const MODULE_PATH = '../../src/PersistorFactory.js'
 
 describe('PersistorManager', function () {
   let PersistorFactory, FSPersistor, S3Persistor, Settings, GcsPersistor
@@ -33,8 +34,9 @@ describe('PersistorManager', function () {
         info() {},
         err() {},
       },
+      'stream/promises': StreamPromises,
     }
-    PersistorFactory = SandboxedModule.require(modulePath, { requires })
+    PersistorFactory = SandboxedModule.require(MODULE_PATH, { requires })
   })
 
   it('should implement the S3 wrapped method when S3 is configured', function () {
diff --git a/libraries/object-persistor/test/unit/S3PersistorTests.js b/libraries/object-persistor/test/unit/S3PersistorTests.js
index 3c12f4ed3d..0c109202a1 100644
--- a/libraries/object-persistor/test/unit/S3PersistorTests.js
+++ b/libraries/object-persistor/test/unit/S3PersistorTests.js
@@ -1,11 +1,11 @@
 const sinon = require('sinon')
 const chai = require('chai')
 const { expect } = chai
-const modulePath = '../../src/S3Persistor.js'
 const SandboxedModule = require('sandboxed-module')
-
 const Errors = require('../../src/Errors')
 
+const MODULE_PATH = '../../src/S3Persistor.js'
+
 describe('S3PersistorTests', function () {
   const defaultS3Key = 'frog'
   const defaultS3Secret = 'prince'
@@ -35,6 +35,7 @@ describe('S3PersistorTests', function () {
     Fs,
     ReadStream,
     Stream,
+    StreamPromises,
     S3Persistor,
     S3Client,
     S3ReadStream,
@@ -65,10 +66,13 @@ describe('S3PersistorTests', function () {
     }
 
     Stream = {
-      pipeline: sinon.stub().yields(),
       Transform,
     }
 
+    StreamPromises = {
+      pipeline: sinon.stub().resolves(),
+    }
+
     EmptyPromise = {
       promise: sinon.stub().resolves(),
     }
@@ -145,13 +149,14 @@ describe('S3PersistorTests', function () {
       warn: sinon.stub(),
     }
 
-    S3Persistor = new (SandboxedModule.require(modulePath, {
+    S3Persistor = new (SandboxedModule.require(MODULE_PATH, {
       requires: {
         'aws-sdk/clients/s3': S3,
         '@overleaf/logger': Logger,
         './Errors': Errors,
         fs: Fs,
         stream: Stream,
+        'stream/promises': StreamPromises,
         crypto,
       },
       globals: { console, Buffer },