diff --git a/@types/interfaces.d.ts b/@types/interfaces.d.ts
index c47ddd5..6010fca 100644
--- a/@types/interfaces.d.ts
+++ b/@types/interfaces.d.ts
@@ -6,5 +6,5 @@ export type NotificationPosition =
 
 export type NotificationRenderer = (
   root: HTMLElement,
-  notification: NotificationElement
+  notification?: NotificationElement
 ) => void;