diff --git a/package.json b/package.json
index 7e2bdb0..db3f26a 100644
--- a/package.json
+++ b/package.json
@@ -51,18 +51,15 @@
     "basic-auth": "^2.0.1",
     "cors": "^2.8.5",
     "express": "^4.18.2",
-    "jose": "^4.14.6",
-    "lodash.isplainobject": "^4.0.6",
-    "uuid": "^9.0.1"
+    "is-plain-obj": "^4.1.0",
+    "jose": "^4.14.6"
   },
   "devDependencies": {
     "@types/basic-auth": "^1.1.4",
     "@types/cors": "^2.8.14",
     "@types/express": "^4.17.18",
-    "@types/lodash.isplainobject": "^4.0.7",
     "@types/node": "^18.18.1",
     "@types/supertest": "^2.0.13",
-    "@types/uuid": "^9.0.4",
     "@typescript-eslint/eslint-plugin": "^6.7.3",
     "@typescript-eslint/parser": "^6.7.3",
     "@vitest/coverage-v8": "^0.34.6",
diff --git a/src/lib/helpers.ts b/src/lib/helpers.ts
index a9fa0fa..603e262 100644
--- a/src/lib/helpers.ts
+++ b/src/lib/helpers.ts
@@ -19,7 +19,7 @@ import { AssertionError } from 'assert';
 import type { AddressInfo } from 'net';
 import { readFileSync } from 'fs';
 
-import isPlainObject from 'lodash.isplainobject';
+import isPlainObject from 'is-plain-obj';
 
 import type { TokenRequest } from './types';
 
diff --git a/src/lib/oauth2-service.ts b/src/lib/oauth2-service.ts
index 4f6f732..950de50 100644
--- a/src/lib/oauth2-service.ts
+++ b/src/lib/oauth2-service.ts
@@ -24,7 +24,7 @@ import express, { type RequestHandler } from 'express';
 import cors from 'cors';
 import basicAuth from 'basic-auth';
 import { EventEmitter } from 'events';
-import { v4 as uuidv4 } from 'uuid';
+import { randomUUID } from 'crypto';
 
 import { OAuth2Issuer } from './oauth2-issuer';
 import {
@@ -259,7 +259,7 @@ export class OAuth2Service extends EventEmitter {
         };
 
         body['id_token'] = await this.buildToken(req, tokenTtl, xfn);
-        body['refresh_token'] = uuidv4();
+        body['refresh_token'] = randomUUID();
       }
 
       const tokenEndpointResponse: MutableResponse = {
@@ -284,7 +284,7 @@ export class OAuth2Service extends EventEmitter {
   };
 
   private authorizeHandler: RequestHandler = (req, res) => {
-    const code = uuidv4();
+    const code = randomUUID();
     const {
       nonce,
       scope,
diff --git a/yarn.lock b/yarn.lock
index 4fca151..3642468 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -375,18 +375,6 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==
 
-"@types/lodash.isplainobject@^4.0.7":
-  version "4.0.7"
-  resolved "https://registry.yarnpkg.com/@types/lodash.isplainobject/-/lodash.isplainobject-4.0.7.tgz#698e3231341b1aa0a16681e7aa8b10ee6d9a7d8c"
-  integrity sha512-fdHtdjpy7fXydEaRHx1dPa+2AVmLbmk2Gv7f0w/90BKCH0DkWo8pIrzygnB3rvgo6oKNb3cO9VaPpj9GLCr5Ug==
-  dependencies:
-    "@types/lodash" "*"
-
-"@types/lodash@*":
-  version "4.14.199"
-  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.199.tgz#c3edb5650149d847a277a8961a7ad360c474e9bf"
-  integrity sha512-Vrjz5N5Ia4SEzWWgIVwnHNEnb1UE1XMkvY5DGXrAeOGE9imk0hgTHh5GyDjLDJi9OTCn9oo9dXH1uToK1VRfrg==
-
 "@types/mime@*":
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-3.0.2.tgz#c1ae807f13d308ee7511a5b81c74f327028e66e8"
@@ -449,11 +437,6 @@
   dependencies:
     "@types/superagent" "*"
 
-"@types/uuid@^9.0.4":
-  version "9.0.4"
-  resolved "https://registry.yarnpkg.com/@types/uuid/-/uuid-9.0.4.tgz#e884a59338da907bda8d2ed03e01c5c49d036f1c"
-  integrity sha512-zAuJWQflfx6dYJM62vna+Sn5aeSWhh3OB+wfUEACNcqUSc0AGc5JKl+ycL1vrH7frGTXhJchYjE1Hak8L819dA==
-
 "@typescript-eslint/eslint-plugin@^6.7.3":
   version "6.7.3"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.7.3.tgz#d98046e9f7102d49a93d944d413c6055c47fafd7"
@@ -1963,6 +1946,11 @@ is-path-inside@^3.0.3:
   resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-3.0.3.tgz#d231362e53a07ff2b0e0ea7fed049161ffd16283"
   integrity sha512-Fd4gABb+ycGAmKou8eMftCupSir5lRxqf4aD/vd0cD2qc4HL07OjCeuHMr8Ro4CoMaeCKDB0/ECBOVWjTwUvPQ==
 
+is-plain-obj@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-4.1.0.tgz#d65025edec3657ce032fd7db63c97883eaed71f0"
+  integrity sha512-+Pgi+vMuUNkJyExiMBt5IlFoMyKnr5zhJ4Uspz58WOhBF5QoIZkFyNHIbBAtHwzVAgk5RtndVNsDRN61/mmDqg==
+
 is-regex@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.1.4.tgz#eef5663cd59fa4c0ae339505323df6854bb15958"
@@ -2144,11 +2132,6 @@ locate-path@^6.0.0:
   dependencies:
     p-locate "^5.0.0"
 
-lodash.isplainobject@^4.0.6:
-  version "4.0.6"
-  resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
-  integrity sha512-oSXzaWypCMHkPC3NvBEaPHf0KsA5mvPrOPgQWDsbg8n7orZ290M0BmC/jgRZ4vcJ6DTAhjrsSYgdsW/F+MFOBA==
-
 lodash.merge@^4.6.2:
   version "4.6.2"
   resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
@@ -2862,6 +2845,7 @@ std-env@^3.3.3:
   integrity sha512-f9aPhy8fYBuMN+sNfakZV18U39PbalgjXG3lLB9WkaYTxijru61wb57V9wxxNthXM5Sd88ETBWi29qLAsHO52Q==
 
 "string-width-cjs@npm:string-width@^4.2.0", string-width@^4.1.0:
+  name string-width-cjs
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
   integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
@@ -3163,11 +3147,6 @@ utils-merge@1.0.1:
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
   integrity sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==
 
-uuid@^9.0.1:
-  version "9.0.1"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-9.0.1.tgz#e188d4c8853cc722220392c424cd637f32293f30"
-  integrity sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==
-
 v8-to-istanbul@^9.1.0:
   version "9.1.0"
   resolved "https://registry.yarnpkg.com/v8-to-istanbul/-/v8-to-istanbul-9.1.0.tgz#1b83ed4e397f58c85c266a570fc2558b5feb9265"