diff --git a/source/types/request.ts b/source/types/request.ts
index d56219a5..17e31086 100644
--- a/source/types/request.ts
+++ b/source/types/request.ts
@@ -1,15 +1,56 @@
+/*
+Undici types need to be here because they are not exported to globals by @types/node.
+See https://github.com/DefinitelyTyped/DefinitelyTyped/discussions/69408
+
+After the types are exported to globals, the Undici types can be removed from here.
+*/
+
+type UndiciHeadersInit =
+	| string[][]
+	| Record<string, string | readonly string[]>
+	| Headers;
+
+type UndiciBodyInit =
+	| ArrayBuffer
+	| AsyncIterable<Uint8Array>
+	| Blob
+	| FormData
+	| Iterable<Uint8Array>
+	| NodeJS.ArrayBufferView
+	| URLSearchParams
+	// eslint-disable-next-line @typescript-eslint/ban-types
+	| null
+	| string;
+
+type UndiciRequestRedirect = 'error' | 'follow' | 'manual';
+
+type UndiciRequestCredentials = 'omit' | 'include' | 'same-origin';
+
+type UndiciReferrerPolicy =
+	| ''
+	| 'no-referrer'
+	| 'no-referrer-when-downgrade'
+	| 'origin'
+	| 'origin-when-cross-origin'
+	| 'same-origin'
+	| 'strict-origin'
+	| 'strict-origin-when-cross-origin'
+	| 'unsafe-url';
+
+type UndiciRequestMode = 'cors' | 'navigate' | 'no-cors' | 'same-origin';
+
 type UndiciRequestInit = {
 	method?: string;
 	keepalive?: boolean;
-	headers?: HeadersInit;
-	body?: BodyInit;
-	redirect?: RequestRedirect;
+	headers?: UndiciHeadersInit;
+	body?: UndiciBodyInit;
+	redirect?: UndiciRequestRedirect;
 	integrity?: string;
 	signal?: AbortSignal | undefined;
-	credentials?: RequestCredentials;
-	mode?: RequestMode;
+	credentials?: UndiciRequestCredentials;
+	mode?: UndiciRequestMode;
 	referrer?: string;
-	referrerPolicy?: ReferrerPolicy;
+	referrerPolicy?: UndiciReferrerPolicy;
 	window?: undefined;
 	dispatcher?: unknown;
 	duplex?: unknown;