diff --git a/src/types/index.ts b/src/types/index.ts
index 5d7a349..2723a4c 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -16,7 +16,7 @@ export type FormInput = {
 	validate: Validation;
 	display: string | ((req: Request) => Promise<string> | string);
 	handler?: (req: Request) => Promise<void>;
-	next_input?: string | ((req: Request) => Promise<string> | string);
+	next_input?: string | ((req: Request) => Promise<string> | string | undefined);
 	end?: boolean | ((req: Request) => boolean);
 	next_menu?: NextMenu;
 };