diff --git a/src/_shims/index-deno.ts b/src/_shims/index-deno.ts
index f935ad89..776b09ab 100644
--- a/src/_shims/index-deno.ts
+++ b/src/_shims/index-deno.ts
@@ -64,7 +64,7 @@ const _Blob = Blob;
 type _Blob = Blob;
 export { _Blob as Blob };
 
-export async function getMultipartRequestOptions<T extends {} = Record<string, unknown>>(
+export async function getMultipartRequestOptions<T = Record<string, unknown>>(
   form: FormData,
   opts: RequestOptions<T>,
 ): Promise<RequestOptions<T>> {
diff --git a/src/_shims/index.d.ts b/src/_shims/index.d.ts
index 4c359af1..ca17d681 100644
--- a/src/_shims/index.d.ts
+++ b/src/_shims/index.d.ts
@@ -65,7 +65,7 @@ export type ReadableStream = SelectType<manual.ReadableStream, auto.ReadableStre
 // @ts-ignore
 export const ReadableStream: SelectType<typeof manual.ReadableStream, typeof auto.ReadableStream>;
 
-export function getMultipartRequestOptions<T extends {} = Record<string, unknown>>(
+export function getMultipartRequestOptions<T = Record<string, unknown>>(
   form: FormData,
   opts: RequestOptions<T>,
 ): Promise<RequestOptions<T>>;
diff --git a/src/_shims/node-runtime.ts b/src/_shims/node-runtime.ts
index 7d24b707..a9c42ebe 100644
--- a/src/_shims/node-runtime.ts
+++ b/src/_shims/node-runtime.ts
@@ -43,7 +43,7 @@ async function fileFromPath(path: string, ...args: any[]): Promise<File> {
 const defaultHttpAgent: Agent = new KeepAliveAgent({ keepAlive: true, timeout: 5 * 60 * 1000 });
 const defaultHttpsAgent: Agent = new KeepAliveAgent.HttpsAgent({ keepAlive: true, timeout: 5 * 60 * 1000 });
 
-async function getMultipartRequestOptions<T extends {} = Record<string, unknown>>(
+async function getMultipartRequestOptions<T = Record<string, unknown>>(
   form: fd.FormData,
   opts: RequestOptions<T>,
 ): Promise<RequestOptions<T>> {
diff --git a/src/_shims/registry.ts b/src/_shims/registry.ts
index 3e28e99c..248f9a5e 100644
--- a/src/_shims/registry.ts
+++ b/src/_shims/registry.ts
@@ -13,7 +13,7 @@ export interface Shims {
   Blob: any;
   File: any;
   ReadableStream: any;
-  getMultipartRequestOptions: <T extends {} = Record<string, unknown>>(
+  getMultipartRequestOptions: <T = Record<string, unknown>>(
     form: Shims['FormData'],
     opts: RequestOptions<T>,
   ) => Promise<RequestOptions<T>>;
diff --git a/src/_shims/web-runtime.ts b/src/_shims/web-runtime.ts
index 96cd146c..b905cd6e 100644
--- a/src/_shims/web-runtime.ts
+++ b/src/_shims/web-runtime.ts
@@ -84,7 +84,7 @@ export function getRuntime({ manuallyImported }: { manuallyImported?: boolean }
           }
         }
       ),
-    getMultipartRequestOptions: async <T extends {} = Record<string, unknown>>(
+    getMultipartRequestOptions: async <T = Record<string, unknown>>(
       // @ts-ignore
       form: FormData,
       opts: RequestOptions<T>,
diff --git a/src/core.ts b/src/core.ts
index e49ef39a..facf5961 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -208,27 +208,27 @@ export abstract class APIClient {
     return `stainless-node-retry-${uuid4()}`;
   }
 
-  get<Req extends {}, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
+  get<Req, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
     return this.methodRequest('get', path, opts);
   }
 
-  post<Req extends {}, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
+  post<Req, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
     return this.methodRequest('post', path, opts);
   }
 
-  patch<Req extends {}, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
+  patch<Req, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
     return this.methodRequest('patch', path, opts);
   }
 
-  put<Req extends {}, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
+  put<Req, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
     return this.methodRequest('put', path, opts);
   }
 
-  delete<Req extends {}, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
+  delete<Req, Rsp>(path: string, opts?: PromiseOrValue<RequestOptions<Req>>): APIPromise<Rsp> {
     return this.methodRequest('delete', path, opts);
   }
 
-  private methodRequest<Req extends {}, Rsp>(
+  private methodRequest<Req, Rsp>(
     method: HTTPMethod,
     path: string,
     opts?: PromiseOrValue<RequestOptions<Req>>,
@@ -260,9 +260,7 @@ export abstract class APIClient {
     return null;
   }
 
-  buildRequest<Req extends {}>(
-    options: FinalRequestOptions<Req>,
-  ): { req: RequestInit; url: string; timeout: number } {
+  buildRequest<Req>(options: FinalRequestOptions<Req>): { req: RequestInit; url: string; timeout: number } {
     const { method, path, query, headers: headers = {} } = options;
 
     const body =
@@ -364,15 +362,15 @@ export abstract class APIClient {
     return APIError.generate(status, error, message, headers);
   }
 
-  request<Req extends {}, Rsp>(
+  request<Req, Rsp>(
     options: PromiseOrValue<FinalRequestOptions<Req>>,
     remainingRetries: number | null = null,
   ): APIPromise<Rsp> {
     return new APIPromise(this.makeRequest(options, remainingRetries));
   }
 
-  private async makeRequest(
-    optionsInput: PromiseOrValue<FinalRequestOptions>,
+  private async makeRequest<Req>(
+    optionsInput: PromiseOrValue<FinalRequestOptions<Req>>,
     retriesRemaining: number | null,
   ): Promise<APIResponseProps> {
     const options = await optionsInput;
@@ -434,7 +432,7 @@ export abstract class APIClient {
     return new PagePromise<PageClass, Item>(this, request, Page);
   }
 
-  buildURL<Req extends Record<string, unknown>>(path: string, query: Req | null | undefined): string {
+  buildURL<Req>(path: string, query: Req | null | undefined): string {
     const url =
       isAbsoluteURL(path) ?
         new URL(path)
@@ -608,7 +606,7 @@ export abstract class AbstractPage<Item> implements AsyncIterable<Item> {
       );
     }
     const nextOptions = { ...this.options };
-    if ('params' in nextInfo) {
+    if ('params' in nextInfo && typeof nextOptions.query === 'object') {
       nextOptions.query = { ...nextOptions.query, ...nextInfo.params };
     } else if ('url' in nextInfo) {
       const params = [...Object.entries(nextOptions.query || {}), ...nextInfo.url.searchParams.entries()];
@@ -706,7 +704,7 @@ export type Headers = Record<string, string | null | undefined>;
 export type DefaultQuery = Record<string, string | undefined>;
 export type KeysEnum<T> = { [P in keyof Required<T>]: true };
 
-export type RequestOptions<Req extends {} = Record<string, unknown> | Readable> = {
+export type RequestOptions<Req = unknown | Record<string, unknown> | Readable> = {
   method?: HTTPMethod;
   path?: string;
   query?: Req | undefined;
@@ -743,7 +741,7 @@ const requestOptionsKeys: KeysEnum<RequestOptions> = {
   __binaryResponse: true,
 };
 
-export const isRequestOptions = (obj: unknown): obj is RequestOptions<Record<string, unknown> | Readable> => {
+export const isRequestOptions = (obj: unknown): obj is RequestOptions => {
   return (
     typeof obj === 'object' &&
     obj !== null &&
@@ -752,7 +750,7 @@ export const isRequestOptions = (obj: unknown): obj is RequestOptions<Record<str
   );
 };
 
-export type FinalRequestOptions<Req extends {} = Record<string, unknown> | Readable> = RequestOptions<Req> & {
+export type FinalRequestOptions<Req = unknown | Record<string, unknown> | Readable> = RequestOptions<Req> & {
   method: HTTPMethod;
   path: string;
 };
diff --git a/src/uploads.ts b/src/uploads.ts
index bc2afefa..2398baf3 100644
--- a/src/uploads.ts
+++ b/src/uploads.ts
@@ -184,7 +184,7 @@ export const isMultipartBody = (body: any): body is MultipartBody =>
  * Returns a multipart/form-data request if any part of the given request body contains a File / Blob value.
  * Otherwise returns the request as is.
  */
-export const maybeMultipartFormRequestOptions = async <T extends {} = Record<string, unknown>>(
+export const maybeMultipartFormRequestOptions = async <T = Record<string, unknown>>(
   opts: RequestOptions<T>,
 ): Promise<RequestOptions<T | MultipartBody>> => {
   if (!hasUploadableValue(opts.body)) return opts;
@@ -193,7 +193,7 @@ export const maybeMultipartFormRequestOptions = async <T extends {} = Record<str
   return getMultipartRequestOptions(form, opts);
 };
 
-export const multipartFormRequestOptions = async <T extends {} = Record<string, unknown>>(
+export const multipartFormRequestOptions = async <T = Record<string, unknown>>(
   opts: RequestOptions<T>,
 ): Promise<RequestOptions<T | MultipartBody>> => {
   const form = await createForm(opts.body);