diff --git a/backend/constants/quote-languages.js b/backend/constants/quote-languages.ts
similarity index 100%
rename from backend/constants/quote-languages.js
rename to backend/constants/quote-languages.ts
diff --git a/backend/dao/new-quotes.js b/backend/dao/new-quotes.js
index f064fb22a..80a9e815c 100644
--- a/backend/dao/new-quotes.js
+++ b/backend/dao/new-quotes.js
@@ -1,6 +1,5 @@
 import simpleGit from "simple-git";
-import Mongo from "mongodb";
-const { ObjectID } = Mongo;
+import { ObjectId } from "mongodb";
 import stringSimilarity from "string-similarity";
 import path from "path";
 import fs from "fs";
@@ -68,17 +67,17 @@ class NewQuotesDAO {
   static async approve(quoteId, editQuote, editSource) {
     if (!git) throw new MonkeyError(500, "Git not available.");
     //check mod status
-    let quote = await db
+    const targetQuote = await db
       .collection("new-quotes")
-      .findOne({ _id: ObjectID(quoteId) });
-    if (!quote) {
+      .findOne({ _id: new ObjectId(quoteId) });
+    if (!targetQuote) {
       throw new MonkeyError(404, "Quote not found");
     }
-    let language = quote.language;
-    quote = {
-      text: editQuote ? editQuote : quote.text,
-      source: editSource ? editSource : quote.source,
-      length: quote.text.length,
+    const language = targetQuote.language;
+    const quote = {
+      text: editQuote ? editQuote : targetQuote.text,
+      source: editSource ? editSource : targetQuote.source,
+      length: targetQuote.text.length,
     };
     let message = "";
     const fileDir = path.join(
@@ -125,7 +124,7 @@ class NewQuotesDAO {
     await git.add([`static/quotes/${language}.json`]);
     await git.commit(`Added quote to ${language}.json`);
     await git.push("origin", "master");
-    await db.collection("new-quotes").deleteOne({ _id: ObjectID(quoteId) });
+    await db.collection("new-quotes").deleteOne({ _id: new ObjectId(quoteId) });
     return { quote, message };
   }
 
@@ -133,7 +132,7 @@ class NewQuotesDAO {
     if (!git) throw new MonkeyError(500, "Git not available.");
     return await db
       .collection("new-quotes")
-      .deleteOne({ _id: ObjectID(quoteId) });
+      .deleteOne({ _id: new ObjectId(quoteId) });
   }
 }
 
diff --git a/backend/dao/preset.js b/backend/dao/preset.js
index 191b1aec5..49a6b69f3 100644
--- a/backend/dao/preset.js
+++ b/backend/dao/preset.js
@@ -1,7 +1,6 @@
 import MonkeyError from "../handlers/error";
 import db from "../init/db";
-import Mongo from "mongodb";
-const { ObjectID } = Mongo;
+import { ObjectId } from "mongodb";
 
 class PresetDAO {
   static async getPresets(uid) {
@@ -28,27 +27,27 @@ class PresetDAO {
     console.log(_id);
     const preset = await db
       .collection("presets")
-      .findOne({ uid, _id: ObjectID(_id) });
+      .findOne({ uid, _id: new ObjectId(_id) });
     if (!preset) throw new MonkeyError(404, "Preset not found");
     if (config) {
       return await db
         .collection("presets")
-        .updateOne({ uid, _id: ObjectID(_id) }, { $set: { name, config } });
+        .updateOne({ uid, _id: new ObjectId(_id) }, { $set: { name, config } });
     } else {
       return await db
         .collection("presets")
-        .updateOne({ uid, _id: ObjectID(_id) }, { $set: { name } });
+        .updateOne({ uid, _id: new ObjectId(_id) }, { $set: { name } });
     }
   }
 
   static async removePreset(uid, _id) {
     const preset = await db
       .collection("presets")
-      .findOne({ uid, _id: ObjectID(_id) });
+      .findOne({ uid, _id: new ObjectId(_id) });
     if (!preset) throw new MonkeyError(404, "Preset not found");
     return await db
       .collection("presets")
-      .deleteOne({ uid, _id: ObjectID(_id) });
+      .deleteOne({ uid, _id: new ObjectId(_id) });
   }
 }
 
diff --git a/backend/dao/result.js b/backend/dao/result.js
index f4b6f3d07..1e83e7613 100644
--- a/backend/dao/result.js
+++ b/backend/dao/result.js
@@ -1,5 +1,4 @@
-import Mongo from "mongodb";
-const { ObjectID } = Mongo;
+import { ObjectId } from "mongodb";
 import MonkeyError from "../handlers/error";
 import db from "../init/db";
 
@@ -29,7 +28,7 @@ class ResultDAO {
   static async updateTags(uid, resultid, tags) {
     const result = await db
       .collection("results")
-      .findOne({ _id: ObjectID(resultid), uid });
+      .findOne({ _id: new ObjectId(resultid), uid });
     if (!result) throw new MonkeyError(404, "Result not found");
     const userTags = await UserDAO.getTags(uid);
     const userTagIds = userTags.map((tag) => tag._id.toString());
@@ -41,27 +40,26 @@ class ResultDAO {
       throw new MonkeyError(400, "One of the tag id's is not valid");
     return await db
       .collection("results")
-      .updateOne({ _id: ObjectID(resultid), uid }, { $set: { tags } });
+      .updateOne({ _id: new ObjectId(resultid), uid }, { $set: { tags } });
   }
 
   static async getResult(uid, id) {
     const result = await db
       .collection("results")
-      .findOne({ _id: ObjectID(id), uid });
+      .findOne({ _id: new ObjectId(id), uid });
     if (!result) throw new MonkeyError(404, "Result not found");
     return result;
   }
 
   static async getLastResult(uid) {
-    let result = await db
+    const [lastResult] = await db
       .collection("results")
       .find({ uid })
       .sort({ timestamp: -1 })
       .limit(1)
       .toArray();
-    result = result[0];
-    if (!result) throw new MonkeyError(404, "No results found");
-    return result;
+    if (!lastResult) throw new MonkeyError(404, "No results found");
+    return lastResult;
   }
 
   static async getResultByTimestamp(uid, timestamp) {
diff --git a/backend/dao/user.js b/backend/dao/user.js
index 661d853a7..b186f84b9 100644
--- a/backend/dao/user.js
+++ b/backend/dao/user.js
@@ -3,10 +3,7 @@ import { updateAuthEmail } from "../handlers/auth";
 import { checkAndUpdatePb } from "../handlers/pb";
 import db from "../init/db";
 import MonkeyError from "../handlers/error";
-import Mongo from "mongodb";
-
-const { ObjectID } = Mongo;
-
+import { ObjectId } from "mongodb";
 class UsersDAO {
   static async addUser(name, email, uid) {
     const user = await db.collection("users").findOne({ uid });
@@ -83,7 +80,7 @@ class UsersDAO {
   }
 
   static async addTag(uid, name) {
-    let _id = ObjectID();
+    let _id = new ObjectId();
     await db
       .collection("users")
       .updateOne({ uid }, { $push: { tags: { _id, name } } });
@@ -110,7 +107,7 @@ class UsersDAO {
     return await db.collection("users").updateOne(
       {
         uid: uid,
-        "tags._id": ObjectID(_id),
+        "tags._id": new ObjectId(_id),
       },
       { $set: { "tags.$.name": name } }
     );
@@ -127,9 +124,9 @@ class UsersDAO {
     return await db.collection("users").updateOne(
       {
         uid: uid,
-        "tags._id": ObjectID(_id),
+        "tags._id": new ObjectId(_id),
       },
-      { $pull: { tags: { _id: ObjectID(_id) } } }
+      { $pull: { tags: { _id: new ObjectId(_id) } } }
     );
   }
 
@@ -144,7 +141,7 @@ class UsersDAO {
     return await db.collection("users").updateOne(
       {
         uid: uid,
-        "tags._id": ObjectID(_id),
+        "tags._id": new ObjectId(_id),
       },
       { $set: { "tags.$.personalBests": {} } }
     );
@@ -287,7 +284,7 @@ class UsersDAO {
         await db
           .collection("users")
           .updateOne(
-            { uid, "tags._id": ObjectID(tag._id) },
+            { uid, "tags._id": new ObjectId(tag._id) },
             { $set: { "tags.$.personalBests": tagpb.obj } }
           );
       }
diff --git a/backend/handlers/logger.js b/backend/handlers/logger.js
index dcfa94ded..64fa0b74e 100644
--- a/backend/handlers/logger.js
+++ b/backend/handlers/logger.js
@@ -1,4 +1,4 @@
-import db from "../init/db.js";
+import db from "../init/db";
 
 export default {
   async log(event, message, uid) {
diff --git a/backend/init/db.js b/backend/init/db.ts
similarity index 71%
rename from backend/init/db.js
rename to backend/init/db.ts
index e5a73107a..86aefacb1 100644
--- a/backend/init/db.js
+++ b/backend/init/db.ts
@@ -1,12 +1,19 @@
-import MongoClient from "mongodb/lib/mongo_client.js";
+import {
+  AuthMechanism,
+  Collection,
+  Document,
+  Db,
+  MongoClient,
+  MongoClientOptions,
+} from "mongodb";
 
 class DatabaseClient {
-  static mongoClient = null;
-  static db = null;
-  static collections = {};
+  static mongoClient: MongoClient = null;
+  static db: Db = null;
+  static collections: Record<string, Collection<Document>> = {};
   static connected = false;
 
-  static async connect() {
+  static async connect(): Promise<void> {
     const {
       DB_USERNAME,
       DB_PASSWORD,
@@ -16,9 +23,7 @@ class DatabaseClient {
       DB_NAME,
     } = process.env;
 
-    const connectionOptions = {
-      useNewUrlParser: true,
-      useUnifiedTopology: true,
+    const connectionOptions: MongoClientOptions = {
       connectTimeoutMS: 2000,
       serverSelectionTimeoutMS: 2000,
     };
@@ -31,7 +36,7 @@ class DatabaseClient {
     }
 
     if (DB_AUTH_MECHANISM) {
-      connectionOptions.authMechanism = DB_AUTH_MECHANISM;
+      connectionOptions.authMechanism = DB_AUTH_MECHANISM as AuthMechanism;
     }
 
     if (DB_AUTH_SOURCE) {
@@ -53,13 +58,13 @@ class DatabaseClient {
     }
   }
 
-  static async close() {
+  static async close(): Promise<void> {
     if (this.connected) {
       await this.mongoClient.close();
     }
   }
 
-  static collection(collectionName) {
+  static collection(collectionName: string): Collection<Document> {
     if (!this.connected) {
       return null;
     }
diff --git a/backend/package-lock.json b/backend/package-lock.json
index caccf9a96..2de2c38d9 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -18,7 +18,7 @@
         "helmet": "4.6.0",
         "joi": "17.6.0",
         "lodash": "4.17.21",
-        "mongodb": "3.6.9",
+        "mongodb": "4.4.0",
         "node-fetch": "2.6.7",
         "node-object-hash": "2.3.10",
         "nodemon": "2.0.7",
@@ -30,6 +30,7 @@
       },
       "devDependencies": {
         "@types/cors": "2.8.12",
+        "@types/mongodb": "4.0.7",
         "@types/node": "17.0.18",
         "@types/uuid": "8.3.4"
       },
@@ -482,6 +483,16 @@
       "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.2.tgz",
       "integrity": "sha512-YATxVxgRqNH6nHEIsvg6k2Boc1JHI9ZbH5iWFFv/MTkchz3b1ieGDa5T0a9RznNdI0KhVbdbWSN+KWWrQZRxTw=="
     },
+    "node_modules/@types/mongodb": {
+      "version": "4.0.7",
+      "resolved": "https://registry.npmjs.org/@types/mongodb/-/mongodb-4.0.7.tgz",
+      "integrity": "sha512-lPUYPpzA43baXqnd36cZ9xxorprybxXDzteVKCPAdp14ppHtFJHnXYvNpmBvtMUTb5fKXVv6sVbzo1LHkWhJlw==",
+      "deprecated": "mongodb provides its own types. @types/mongodb is no longer needed.",
+      "dev": true,
+      "dependencies": {
+        "mongodb": "*"
+      }
+    },
     "node_modules/@types/node": {
       "version": "17.0.18",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-17.0.18.tgz",
@@ -512,6 +523,20 @@
       "integrity": "sha512-c/I8ZRb51j+pYGAu5CrFMRxqZ2ke4y2grEBO5AUjgSkSk+qT2Ea+OdWElz/OiMf5MNpn2b17kuVBwZLQJXzihw==",
       "dev": true
     },
+    "node_modules/@types/webidl-conversions": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@types/webidl-conversions/-/webidl-conversions-6.1.1.tgz",
+      "integrity": "sha512-XAahCdThVuCFDQLT7R7Pk/vqeObFNL3YqRyFZg+AqAP/W1/w3xHaIxuW7WszQqTbIBOPRcItYJIou3i/mppu3Q=="
+    },
+    "node_modules/@types/whatwg-url": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-url/-/whatwg-url-8.2.1.tgz",
+      "integrity": "sha512-2YubE1sjj5ifxievI5Ge1sckb9k/Er66HyR2c+3+I6VDUUg1TLPdYYTEbQ+DjRkS4nTxMJhgWfSfMRD2sl2EYQ==",
+      "dependencies": {
+        "@types/node": "*",
+        "@types/webidl-conversions": "*"
+      }
+    },
     "node_modules/abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
@@ -663,8 +688,7 @@
           "type": "consulting",
           "url": "https://feross.org/support"
         }
-      ],
-      "optional": true
+      ]
     },
     "node_modules/bignumber.js": {
       "version": "9.0.2",
@@ -683,37 +707,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/bl": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
-      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
-      "dependencies": {
-        "readable-stream": "^2.3.5",
-        "safe-buffer": "^5.1.1"
-      }
-    },
-    "node_modules/bl/node_modules/readable-stream": {
-      "version": "2.3.7",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
-      "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
-      "dependencies": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.3",
-        "isarray": "~1.0.0",
-        "process-nextick-args": "~2.0.0",
-        "safe-buffer": "~5.1.1",
-        "string_decoder": "~1.1.1",
-        "util-deprecate": "~1.0.1"
-      }
-    },
-    "node_modules/bl/node_modules/string_decoder": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-      "dependencies": {
-        "safe-buffer": "~5.1.0"
-      }
-    },
     "node_modules/body-parser": {
       "version": "1.19.0",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
@@ -776,11 +769,37 @@
       }
     },
     "node_modules/bson": {
-      "version": "1.1.6",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.6.tgz",
-      "integrity": "sha512-EvVNVeGo4tHxwi8L6bPj3y3itEvStdwvvlojVxxbyYfoaxJ6keLgrTuKdyfEAszFK+H3olzBuafE0yoh0D1gdg==",
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-4.6.1.tgz",
+      "integrity": "sha512-I1LQ7Hz5zgwR4QquilLNZwbhPw0Apx7i7X9kGMBTsqPdml/03Q9NBtD9nt/19ahjlphktQImrnderxqpzeVDjw==",
+      "dependencies": {
+        "buffer": "^5.6.0"
+      },
       "engines": {
-        "node": ">=0.6.19"
+        "node": ">=6.9.0"
+      }
+    },
+    "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"
+        }
+      ],
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
       }
     },
     "node_modules/buffer-equal-constant-time": {
@@ -1016,11 +1035,6 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
     },
-    "node_modules/core-util-is": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
-      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
-    },
     "node_modules/cors": {
       "version": "2.8.5",
       "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
@@ -1088,9 +1102,9 @@
       "integrity": "sha512-0ISdNousHvZT2EiFlZeZAHBUvSxmKswVCEf8hW7KWgG4a8MVEu/3Vb6uWYozkjylyCxe0JBIiRB1jV45S70WVQ=="
     },
     "node_modules/denque": {
-      "version": "1.5.1",
-      "resolved": "https://registry.npmjs.org/denque/-/denque-1.5.1.tgz",
-      "integrity": "sha512-XwE+iZ4D6ZUB7mfYRMb5wByE8L74HCn30FBN7sWnXksWc1LO1bPDl67pBR9o/kC4z/xSNAwkMYcGgqDV3BE3Hw==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-2.0.1.tgz",
+      "integrity": "sha512-tfiWc6BQLXNLpNiR5iGd0Ocu3P3VpxfzFiqubLgMfhfOw9WyvgJBd46CClNn9k3qfbjvT//0cf7AlYRX/OslMQ==",
       "engines": {
         "node": ">=0.10"
       }
@@ -1734,6 +1748,25 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/ignore-by-default": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/ignore-by-default/-/ignore-by-default-1.0.1.tgz",
@@ -1765,6 +1798,11 @@
       "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.7.tgz",
       "integrity": "sha512-iKpRpXP+CrP2jyrxvg1kMUpXDyRUFDWurxbnVT1vQPx+Wz9uCYsMIqYuSBLV+PAaZG/d7kRLKRFc9oDMsH+mFQ=="
     },
+    "node_modules/ip": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/ip/-/ip-1.1.5.tgz",
+      "integrity": "sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo="
+    },
     "node_modules/ipaddr.js": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
@@ -1897,11 +1935,6 @@
       "resolved": "https://registry.npmjs.org/is-yarn-global/-/is-yarn-global-0.3.0.tgz",
       "integrity": "sha512-VjSeb/lHmkoyd8ryPVIKvOCn4D1koMqY+vqyjjUfc3xyKtP4dYOxM44sZrnqQSzSds3xyOrUTLTC9LVCVgLngw=="
     },
-    "node_modules/isarray": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
-      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
-    },
     "node_modules/joi": {
       "version": "17.6.0",
       "resolved": "https://registry.npmjs.org/joi/-/joi-17.6.0.tgz",
@@ -2291,41 +2324,60 @@
       }
     },
     "node_modules/mongodb": {
-      "version": "3.6.9",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.6.9.tgz",
-      "integrity": "sha512-1nSCKgSunzn/CXwgOWgbPHUWOO5OfERcuOWISmqd610jn0s8BU9K4879iJVabqgpPPbA6hO7rG48eq+fGED3Mg==",
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-4.4.0.tgz",
+      "integrity": "sha512-1hPhutJj6yxxu0ymwsO0uEimTo+QTh3oQP6YHxmLneBFBOGydYFdnmDDuLiGWimAlMdRN9WuDXY+JGp47aeOwA==",
       "dependencies": {
-        "bl": "^2.2.1",
-        "bson": "^1.1.4",
-        "denque": "^1.4.1",
-        "optional-require": "^1.0.3",
-        "safe-buffer": "^5.1.2"
+        "bson": "^4.6.1",
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     },
     "ms": {
@@ -5394,14 +5486,6 @@
         "wrappy": "1"
       }
     },
-    "optional-require": {
-      "version": "1.1.8",
-      "resolved": "https://registry.npmjs.org/optional-require/-/optional-require-1.1.8.tgz",
-      "integrity": "sha512-jq83qaUb0wNg9Krv1c5OQ+58EK+vHde6aBPzLvPPqJm89UQWsvSuFy9X/OSNJnFeSOKo7btE0n8Nl2+nE+z5nA==",
-      "requires": {
-        "require-at": "^1.0.6"
-      }
-    },
     "p-cancelable": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-1.1.0.tgz",
@@ -5468,11 +5552,6 @@
       "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
       "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI="
     },
-    "process-nextick-args": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
-      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
-    },
     "proto3-json-serializer": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/proto3-json-serializer/-/proto3-json-serializer-0.1.8.tgz",
@@ -5542,6 +5621,11 @@
         "pump": "^3.0.0"
       }
     },
+    "punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+    },
     "pupa": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/pupa/-/pupa-2.1.1.tgz",
@@ -5617,11 +5701,6 @@
         "rc": "^1.2.8"
       }
     },
-    "require-at": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/require-at/-/require-at-1.0.6.tgz",
-      "integrity": "sha512-7i1auJbMUrXEAZCOQ0VNJgmcT2VOKPRl2YGJwgpHpC9CE91Mv4/4UYIUm4chGJaI381ZDq1JUicFii64Hapd8g=="
-    },
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -5781,12 +5860,26 @@
         }
       }
     },
+    "smart-buffer": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
+      "integrity": "sha512-94hK0Hh8rPqQl2xXc3HsaBoOXKV20MToPkcXvwbISWLEs+64sBq5kFgn2kJDHb1Pry9yrP0dxrCI9RRci7RXKg=="
+    },
     "snakeize": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/snakeize/-/snakeize-0.1.0.tgz",
       "integrity": "sha1-EMCI2LWOsHazIpu1oE4jLOEmQi0=",
       "optional": true
     },
+    "socks": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/socks/-/socks-2.6.2.tgz",
+      "integrity": "sha512-zDZhHhZRY9PxRruRMR7kMhnf3I8hDs4S3f9RecfnGxvcBHQcKcIH/oUcEWffsfl1XxdYlA7nnlGbbTvPz9D8gA==",
+      "requires": {
+        "ip": "^1.1.5",
+        "smart-buffer": "^4.2.0"
+      }
+    },
     "sparse-bitfield": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz",
@@ -6018,7 +6111,8 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "optional": true
     },
     "utils-merge": {
       "version": "1.0.1",
diff --git a/backend/package.json b/backend/package.json
index d522eba02..163f00315 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -25,7 +25,7 @@
     "helmet": "4.6.0",
     "joi": "17.6.0",
     "lodash": "4.17.21",
-    "mongodb": "3.6.9",
+    "mongodb": "4.4.0",
     "node-fetch": "2.6.7",
     "node-object-hash": "2.3.10",
     "nodemon": "2.0.7",
@@ -37,6 +37,7 @@
   },
   "devDependencies": {
     "@types/cors": "2.8.12",
+    "@types/mongodb": "4.0.7",
     "@types/node": "17.0.18",
     "@types/uuid": "8.3.4"
   }
diff --git a/backend/server.ts b/backend/server.ts
index def69e079..4c3449915 100644
--- a/backend/server.ts
+++ b/backend/server.ts
@@ -2,7 +2,7 @@ import "dotenv/config";
 import admin, { ServiceAccount } from "firebase-admin";
 // @ts-ignore
 import serviceAccount from "./credentials/serviceAccountKey.json"; // eslint-disable-line require-path-exists/exists
-import db from "./init/db.js";
+import db from "./init/db";
 import jobs from "./jobs";
 import ConfigurationDAO from "./dao/configuration.js";
 import app from "./app";
diff --git a/frontend/src/scripts/test/test-logic.js b/frontend/src/scripts/test/test-logic.js
index 3ff505215..501b16848 100644
--- a/frontend/src/scripts/test/test-logic.js
+++ b/frontend/src/scripts/test/test-logic.js
@@ -1087,7 +1087,7 @@ export async function retrySavingResult() {
   if (response.status !== 200) {
     retrySaving.canRetry = true;
     $("#retrySavingResultButton").removeClass("hidden");
-    return Notifications.add("Result not saved. " + response.data.message, -1);
+    return Notifications.add("Result not saved. " + response.message, -1);
   }
 
   completedEvent._id = response.data.insertedId;