diff --git a/source/known-hook-events.ts b/source/known-hook-events.ts
index 9f0932411..a39866ac0 100644
--- a/source/known-hook-events.ts
+++ b/source/known-hook-events.ts
@@ -39,7 +39,7 @@ Called with [response object](https://github.com/sindresorhus/got#response) and
 
 Each function should return the response. This is especially useful when you want to refresh an access token.
 */
-export type AfterResponseHook = (response: Response, retryWithMergedOptions: (options: NormalizedOptions) => CancelableRequest<Response>) => Response | CancelableRequest<Response>;
+export type AfterResponseHook = (response: Response, retryWithMergedOptions: (options: NormalizedOptions) => CancelableRequest<Response>) => Response | CancelableRequest<Response> | Promise<Response | CancelableRequest<Response>>;
 
 export type HookType =
 	| BeforeErrorHook