diff --git a/package.json b/package.json
index 76afcd2b1e..5fdcc596c6 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,6 @@
     "@types/chai": "^4.3.4",
     "@types/chai-as-promised": "^7.1.5",
     "@types/mocha": "^10.0.1",
-    "@types/qs": "^6.9.7",
     "@typescript-eslint/eslint-plugin": "^4.33.0",
     "@typescript-eslint/parser": "^4.33.0",
     "chai": "^4.3.6",
@@ -55,8 +54,7 @@
     "nanoid": "^3.2.0"
   },
   "dependencies": {
-    "@types/node": ">=8.1.0",
-    "qs": "^6.11.0"
+    "@types/node": ">=8.1.0"
   },
   "license": "MIT",
   "scripts": {
diff --git a/src/utils.ts b/src/utils.ts
index 005256d56e..67dd5c58fb 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,3 @@
-import * as qs from 'qs';
 import {
   RequestData,
   UrlInterpolator,
@@ -43,18 +42,45 @@ export function isOptionsHash(o: unknown): boolean | unknown {
  * Stringifies an Object, accommodating nested objects
  * (forming the conventional key 'parent[child]=value')
  */
-export function stringifyRequestData(data: RequestData | string): string {
-  return (
-    qs
-      .stringify(data, {
-        serializeDate: (d: Date) => Math.floor(d.getTime() / 1000).toString(),
-      })
-      // Don't use strict form encoding by changing the square bracket control
-      // characters back to their literals. This is fine by the server, and
-      // makes these parameter strings easier to read.
-      .replace(/%5B/g, '[')
-      .replace(/%5D/g, ']')
-  );
+export function stringifyRequestData(
+  data: Record<string, any> | string
+): string {
+  if (typeof data === 'string') {
+    return data;
+  }
+
+  const params = new URLSearchParams();
+
+  const serializeDate = (d: Date): string =>
+    Math.floor(d.getTime() / 1000).toString();
+
+  function addToParams(key: string, value: any): void {
+    if (value instanceof Date) {
+      params.append(key, serializeDate(value));
+    } else if (Array.isArray(value)) {
+      value.forEach((v, i) => {
+        addToParams(`${key}[${i}]`, v);
+      });
+    } else if (typeof value === 'object' && value !== null) {
+      Object.entries(value).forEach(([k, v]) => {
+        addToParams(`${key}[${k}]`, v);
+      });
+    } else if (value === null) {
+      params.append(key, '');
+    } else {
+      params.append(key, value);
+    }
+  }
+
+  Object.entries(data).forEach(([key, value]) => {
+    addToParams(key, value);
+  });
+
+  return params
+    .toString()
+    .replace(/\+/g, '%20')
+    .replace(/%5B/g, '[')
+    .replace(/%5D/g, ']');
 }
 
 /**
diff --git a/test/resources/OAuth.spec.js b/test/resources/OAuth.spec.js
index fba0499f97..cdec43ca13 100644
--- a/test/resources/OAuth.spec.js
+++ b/test/resources/OAuth.spec.js
@@ -4,7 +4,7 @@ const stripe = require('../testUtils.js').getSpyableStripe();
 
 const expect = require('chai').expect;
 const URL = require('url');
-const qs = require('qs');
+const qs = require('querystring');
 
 describe('OAuth', () => {
   describe('authorize', () => {
diff --git a/yarn.lock b/yarn.lock
index ed4ae6c1fc..9244e47c78 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -459,11 +459,6 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-18.11.3.tgz#78a6d7ec962b596fc2d2ec102c4dd3ef073fea6a"
   integrity sha512-fNjDQzzOsZeKZu5NATgXUPsaFaTxeRgFXoosrHivTl8RGeV733OLawXsGfEk9a8/tySyZUyiZ6E8LcjPFZ2y1A==
 
-"@types/qs@^6.9.7":
-  version "6.9.7"
-  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.7.tgz#63bb7d067db107cc1e457c303bc25d511febf6cb"
-  integrity sha512-FGa1F62FT09qcrueBA6qYTrJPVDzah9a+493+o2PCXsesWHIn27G98TsSMs3WPNbZIEj4+VJf6saSFpvD+3Zsw==
-
 "@typescript-eslint/eslint-plugin@^4.33.0":
   version "4.33.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.33.0.tgz#c24dc7c8069c7706bc40d99f6fa87edcb2005276"
@@ -2638,13 +2633,6 @@ punycode@^2.1.0, punycode@^2.1.1:
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
   integrity sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==
 
-qs@^6.11.0:
-  version "6.11.0"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.11.0.tgz#fd0d963446f7a65e1367e01abd85429453f0c37a"
-  integrity sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==
-  dependencies:
-    side-channel "^1.0.4"
-
 qs@~6.5.2:
   version "6.5.3"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.3.tgz#3aeeffc91967ef6e35c0e488ef46fb296ab76aad"