diff --git a/package-lock.json b/package-lock.json
index 28ccaa00b6..e5f6e79dab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43897,7 +43897,8 @@
         "diff-match-patch": "overleaf/diff-match-patch#89805f9c671a77a263fc53461acd62aa7498f688",
         "express": "^4.18.2",
         "lodash": "^4.17.21",
-        "mongodb": "^4.11.0",
+        "mongodb": "^6.2.0",
+        "mongodb-legacy": "^6.0.1",
         "request": "^2.88.2",
         "requestretry": "^7.1.0"
       },
@@ -43913,54 +43914,70 @@
       }
     },
     "services/document-updater/node_modules/bson": {
-      "version": "4.7.2",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-4.7.2.tgz",
-      "integrity": "sha512-Ry9wCtIZ5kGqkJoi6aD8KjxFZEx78guTQDnpXWiNthsxzrxAK/i8E6pCHAIZTbaEFWcOCvbecMukfK7XUvyLpQ==",
-      "dependencies": {
-        "buffer": "^5.6.0"
-      },
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-6.2.0.tgz",
+      "integrity": "sha512-ID1cI+7bazPDyL9wYy9GaQ8gEEohWvcUl/Yf0dIdutJxnmInEEyCsb4awy/OiBfall7zBA179Pahi3vCdFze3Q==",
       "engines": {
-        "node": ">=6.9.0"
+        "node": ">=16.20.1"
       }
     },
-    "services/document-updater/node_modules/buffer": {
-      "version": "5.7.1",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
-      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ],
+    "services/document-updater/node_modules/gcp-metadata": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/gcp-metadata/-/gcp-metadata-5.3.0.tgz",
+      "integrity": "sha512-FNTkdNEnBdlqF2oatizolQqNANMrcqJt6AAYt99B3y1aLLC8Hc5IOBb+ZnnzllodEEf6xMBp6wRcBbc16fa65w==",
+      "optional": true,
+      "peer": true,
       "dependencies": {
-        "base64-js": "^1.3.1",
-        "ieee754": "^1.1.13"
+        "gaxios": "^5.0.0",
+        "json-bigint": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=12"
       }
     },
     "services/document-updater/node_modules/mongodb": {
-      "version": "4.17.1",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-4.17.1.tgz",
-      "integrity": "sha512-MBuyYiPUPRTqfH2dV0ya4dcr2E5N52ocBuZ8Sgg/M030nGF78v855B3Z27mZJnp8PxjnUquEnAtjOsphgMZOlQ==",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-6.2.0.tgz",
+      "integrity": "sha512-d7OSuGjGWDZ5usZPqfvb36laQ9CPhnWkAGHT61x5P95p/8nMVeH8asloMwW6GcYFeB0Vj4CB/1wOTDG2RA9BFA==",
       "dependencies": {
-        "bson": "^4.7.2",
-        "mongodb-connection-string-url": "^2.6.0",
-        "socks": "^2.7.1"
+        "@mongodb-js/saslprep": "^1.1.0",
+        "bson": "^6.2.0",
+        "mongodb-connection-string-url": "^2.6.0"
       },
       "engines": {
-        "node": ">=12.9.0"
+        "node": ">=16.20.1"
       },
-      "optionalDependencies": {
-        "@aws-sdk/credential-providers": "^3.186.0",
-        "@mongodb-js/saslprep": "^1.1.0"
+      "peerDependencies": {
+        "@aws-sdk/credential-providers": "^3.188.0",
+        "@mongodb-js/zstd": "^1.1.0",
+        "gcp-metadata": "^5.2.0",
+        "kerberos": "^2.0.1",
+        "mongodb-client-encryption": ">=6.0.0 <7",
+        "snappy": "^7.2.2",
+        "socks": "^2.7.1"
+      },
+      "peerDependenciesMeta": {
+        "@aws-sdk/credential-providers": {
+          "optional": true
+        },
+        "@mongodb-js/zstd": {
+          "optional": true
+        },
+        "gcp-metadata": {
+          "optional": true
+        },
+        "kerberos": {
+          "optional": true
+        },
+        "mongodb-client-encryption": {
+          "optional": true
+        },
+        "snappy": {
+          "optional": true
+        },
+        "socks": {
+          "optional": true
+        }
       }
     },
     "services/filestore": {
@@ -54189,7 +54206,8 @@
         "express": "^4.18.2",
         "lodash": "^4.17.21",
         "mocha": "^10.2.0",
-        "mongodb": "^4.11.0",
+        "mongodb": "^6.2.0",
+        "mongodb-legacy": "^6.0.1",
         "request": "^2.88.2",
         "requestretry": "^7.1.0",
         "sandboxed-module": "^2.0.4",
@@ -54199,32 +54217,29 @@
       },
       "dependencies": {
         "bson": {
-          "version": "4.7.2",
-          "resolved": "https://registry.npmjs.org/bson/-/bson-4.7.2.tgz",
-          "integrity": "sha512-Ry9wCtIZ5kGqkJoi6aD8KjxFZEx78guTQDnpXWiNthsxzrxAK/i8E6pCHAIZTbaEFWcOCvbecMukfK7XUvyLpQ==",
-          "requires": {
-            "buffer": "^5.6.0"
-          }
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/bson/-/bson-6.2.0.tgz",
+          "integrity": "sha512-ID1cI+7bazPDyL9wYy9GaQ8gEEohWvcUl/Yf0dIdutJxnmInEEyCsb4awy/OiBfall7zBA179Pahi3vCdFze3Q=="
         },
-        "buffer": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
-          "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+        "gcp-metadata": {
+          "version": "5.3.0",
+          "resolved": "https://registry.npmjs.org/gcp-metadata/-/gcp-metadata-5.3.0.tgz",
+          "integrity": "sha512-FNTkdNEnBdlqF2oatizolQqNANMrcqJt6AAYt99B3y1aLLC8Hc5IOBb+ZnnzllodEEf6xMBp6wRcBbc16fa65w==",
+          "optional": true,
+          "peer": true,
           "requires": {
-            "base64-js": "^1.3.1",
-            "ieee754": "^1.1.13"
+            "gaxios": "^5.0.0",
+            "json-bigint": "^1.0.0"
           }
         },
         "mongodb": {
-          "version": "4.17.1",
-          "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-4.17.1.tgz",
-          "integrity": "sha512-MBuyYiPUPRTqfH2dV0ya4dcr2E5N52ocBuZ8Sgg/M030nGF78v855B3Z27mZJnp8PxjnUquEnAtjOsphgMZOlQ==",
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-6.2.0.tgz",
+          "integrity": "sha512-d7OSuGjGWDZ5usZPqfvb36laQ9CPhnWkAGHT61x5P95p/8nMVeH8asloMwW6GcYFeB0Vj4CB/1wOTDG2RA9BFA==",
           "requires": {
-            "@aws-sdk/credential-providers": "^3.186.0",
             "@mongodb-js/saslprep": "^1.1.0",
-            "bson": "^4.7.2",
-            "mongodb-connection-string-url": "^2.6.0",
-            "socks": "^2.7.1"
+            "bson": "^6.2.0",
+            "mongodb-connection-string-url": "^2.6.0"
           }
         }
       }
diff --git a/services/document-updater/app/js/SnapshotManager.js b/services/document-updater/app/js/SnapshotManager.js
index 78084e024c..194e043549 100644
--- a/services/document-updater/app/js/SnapshotManager.js
+++ b/services/document-updater/app/js/SnapshotManager.js
@@ -16,8 +16,8 @@ const { db, ObjectId } = require('./mongodb')
 module.exports = SnapshotManager = {
   recordSnapshot(projectId, docId, version, pathname, lines, ranges, callback) {
     try {
-      projectId = ObjectId(projectId)
-      docId = ObjectId(docId)
+      projectId = new ObjectId(projectId)
+      docId = new ObjectId(docId)
     } catch (error) {
       return callback(error)
     }
@@ -70,7 +70,7 @@ module.exports = SnapshotManager = {
 
   _safeObjectId(data) {
     try {
-      return ObjectId(data)
+      return new ObjectId(data)
     } catch (error) {
       return data
     }
diff --git a/services/document-updater/app/js/mongodb.js b/services/document-updater/app/js/mongodb.js
index 52868d45c8..8d5258e1d9 100644
--- a/services/document-updater/app/js/mongodb.js
+++ b/services/document-updater/app/js/mongodb.js
@@ -1,6 +1,6 @@
 const Metrics = require('@overleaf/metrics')
 const Settings = require('@overleaf/settings')
-const { MongoClient, ObjectId } = require('mongodb')
+const { MongoClient, ObjectId } = require('mongodb-legacy')
 
 const mongoClient = new MongoClient(Settings.mongo.url)
 const mongoDb = mongoClient.db()
diff --git a/services/document-updater/package.json b/services/document-updater/package.json
index f1c86b2897..56821adb8f 100644
--- a/services/document-updater/package.json
+++ b/services/document-updater/package.json
@@ -29,7 +29,8 @@
     "diff-match-patch": "overleaf/diff-match-patch#89805f9c671a77a263fc53461acd62aa7498f688",
     "express": "^4.18.2",
     "lodash": "^4.17.21",
-    "mongodb": "^4.11.0",
+    "mongodb": "^6.2.0",
+    "mongodb-legacy": "^6.0.1",
     "request": "^2.88.2",
     "requestretry": "^7.1.0"
   },
diff --git a/services/document-updater/scripts/remove_deleted_docs.js b/services/document-updater/scripts/remove_deleted_docs.js
index 78965ac31b..c614c354d7 100644
--- a/services/document-updater/scripts/remove_deleted_docs.js
+++ b/services/document-updater/scripts/remove_deleted_docs.js
@@ -19,7 +19,7 @@ async function removeDeletedDocs(dockeys, options) {
   const docIds = ProjectFlusher._extractIds(dockeys)
   for (const docId of docIds) {
     summary.totalDocs++
-    const docCount = await db.docs.find({ _id: ObjectId(docId) }).count()
+    const docCount = await db.docs.find({ _id: new ObjectId(docId) }).count()
     if (!docCount) {
       try {
         await removeDeletedDoc(docId, options)
@@ -44,7 +44,7 @@ async function removeDeletedDoc(docId, options) {
     lastUpdatedBy,
   ] = await getDoc(projectId, docId)
 
-  const project = await db.projects.findOne({ _id: ObjectId(projectId) })
+  const project = await db.projects.findOne({ _id: new ObjectId(projectId) })
 
   let status
 
diff --git a/services/document-updater/test/acceptance/js/RangesTests.js b/services/document-updater/test/acceptance/js/RangesTests.js
index 809e8e4b62..102205709c 100644
--- a/services/document-updater/test/acceptance/js/RangesTests.js
+++ b/services/document-updater/test/acceptance/js/RangesTests.js
@@ -703,8 +703,8 @@ describe('Ranges', function () {
           }
           db.docSnapshots
             .find({
-              project_id: ObjectId(this.project_id),
-              doc_id: ObjectId(this.doc_id),
+              project_id: new ObjectId(this.project_id),
+              doc_id: new ObjectId(this.doc_id),
             })
             .toArray((error, docSnapshots) => {
               if (error != null) {