diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index dbe1b2b..7a74ef5 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.41.0"
+  ".": "0.41.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fafba89..c21ac4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.41.1 (2026-02-27)
+
+Full Changelog: [v0.41.0...v0.41.1](https://github.com/kernel/kernel-node-sdk/compare/v0.41.0...v0.41.1)
+
+### Chores
+
+* **internal:** move stringifyQuery implementation to internal function ([6c5754b](https://github.com/kernel/kernel-node-sdk/commit/6c5754b181e0f7abf9bcf8b6c5dfc7d7dbfda8ac))
+
 ## 0.41.0 (2026-02-27)
 
 Full Changelog: [v0.40.0...v0.41.0](https://github.com/kernel/kernel-node-sdk/compare/v0.40.0...v0.41.0)
diff --git a/package.json b/package.json
index 4b73343..126cb56 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@onkernel/sdk",
-  "version": "0.41.0",
+  "version": "0.41.1",
   "description": "The official TypeScript library for the Kernel API",
   "author": "Kernel <>",
   "types": "dist/index.d.ts",
diff --git a/src/client.ts b/src/client.ts
index cd00f44..d520668 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -11,6 +11,7 @@ import type { APIResponseProps } from './internal/parse';
 import { getPlatformHeaders } from './internal/detect-platform';
 import * as Shims from './internal/shims';
 import * as Opts from './internal/request-options';
+import { stringifyQuery } from './internal/utils/query';
 import { VERSION } from './version';
 import * as Errors from './core/error';
 import * as Pagination from './core/pagination';
@@ -348,21 +349,8 @@ export class Kernel {
   /**
    * Basic re-implementation of `qs.stringify` for primitive types.
    */
-  protected stringifyQuery(query: Record<string, unknown>): string {
-    return Object.entries(query)
-      .filter(([_, value]) => typeof value !== 'undefined')
-      .map(([key, value]) => {
-        if (typeof value === 'string' || typeof value === 'number' || typeof value === 'boolean') {
-          return `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
-        }
-        if (value === null) {
-          return `${encodeURIComponent(key)}=`;
-        }
-        throw new Errors.KernelError(
-          `Cannot stringify type ${typeof value}; Expected string, number, boolean, or null. If you need to pass nested query parameters, you can manually encode them, e.g. { query: { 'foo[key1]': value1, 'foo[key2]': value2 } }, and please open a GitHub issue requesting better support for your use case.`,
-        );
-      })
-      .join('&');
+  protected stringifyQuery(query: object | Record<string, unknown>): string {
+    return stringifyQuery(query);
   }
 
   private getUserAgent(): string {
@@ -399,7 +387,7 @@ export class Kernel {
     }
 
     if (typeof query === 'object' && query && !Array.isArray(query)) {
-      url.search = this.stringifyQuery(query as Record<string, unknown>);
+      url.search = this.stringifyQuery(query);
     }
 
     return url.toString();
@@ -862,7 +850,7 @@ export class Kernel {
     ) {
       return {
         bodyHeaders: { 'content-type': 'application/x-www-form-urlencoded' },
-        body: this.stringifyQuery(body as Record<string, unknown>),
+        body: this.stringifyQuery(body),
       };
     } else {
       return this.#encoder({ body, headers });
diff --git a/src/internal/utils.ts b/src/internal/utils.ts
index 3cbfacc..c591353 100644
--- a/src/internal/utils.ts
+++ b/src/internal/utils.ts
@@ -6,3 +6,4 @@ export * from './utils/env';
 export * from './utils/log';
 export * from './utils/uuid';
 export * from './utils/sleep';
+export * from './utils/query';
diff --git a/src/internal/utils/query.ts b/src/internal/utils/query.ts
new file mode 100644
index 0000000..50550d3
--- /dev/null
+++ b/src/internal/utils/query.ts
@@ -0,0 +1,23 @@
+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+
+import { KernelError } from '../../core/error';
+
+/**
+ * Basic re-implementation of `qs.stringify` for primitive types.
+ */
+export function stringifyQuery(query: object | Record<string, unknown>) {
+  return Object.entries(query)
+    .filter(([_, value]) => typeof value !== 'undefined')
+    .map(([key, value]) => {
+      if (typeof value === 'string' || typeof value === 'number' || typeof value === 'boolean') {
+        return `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
+      }
+      if (value === null) {
+        return `${encodeURIComponent(key)}=`;
+      }
+      throw new KernelError(
+        `Cannot stringify type ${typeof value}; Expected string, number, boolean, or null. If you need to pass nested query parameters, you can manually encode them, e.g. { query: { 'foo[key1]': value1, 'foo[key2]': value2 } }, and please open a GitHub issue requesting better support for your use case.`,
+      );
+    })
+    .join('&');
+}
diff --git a/src/version.ts b/src/version.ts
index 2f1576d..d7569a4 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '0.41.0'; // x-release-please-version
+export const VERSION = '0.41.1'; // x-release-please-version
diff --git a/tests/stringifyQuery.test.ts b/tests/stringifyQuery.test.ts
index 1170f01..dedd39a 100644
--- a/tests/stringifyQuery.test.ts
+++ b/tests/stringifyQuery.test.ts
@@ -1,8 +1,6 @@
 // File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
-import { Kernel } from '@onkernel/sdk';
-
-const { stringifyQuery } = Kernel.prototype as any;
+import { stringifyQuery } from '@onkernel/sdk/internal/utils/query';
 
 describe(stringifyQuery, () => {
   for (const [input, expected] of [
@@ -15,7 +13,7 @@ describe(stringifyQuery, () => {
         'e=f',
       )}=${encodeURIComponent('g&h')}`,
     ],
-  ]) {
+  ] as const) {
     it(`${JSON.stringify(input)} -> ${expected}`, () => {
       expect(stringifyQuery(input)).toEqual(expected);
     });