diff --git a/types/toast.d.ts b/types/toast.d.ts
index 727762c7c..f441abfce 100644
--- a/types/toast.d.ts
+++ b/types/toast.d.ts
@@ -9,9 +9,9 @@ export type ToastOptions = {
 
 export interface Toast {
   (message: ToastOptions | string, options?: ToastOptions): void;
-  loading(options?: ToastOptions): void;
-  success(options?: ToastOptions): void;
-  fail(options?: ToastOptions): void;
+  loading(options?: ToastOptions | string): void;
+  success(options?: ToastOptions | string): void;
+  fail(options?: ToastOptions | string): void;
   clear(): void;
   install(): void;
   setDefaultOptions(options: ToastOptions): void;