diff --git a/src/types.ts b/src/types.ts
index a8260b7..d50bd45 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -605,7 +605,7 @@ export type RevolutPayEventPayload<
 
 export interface PaymentsModuleRevolutPayInstance {
   mount: (
-    target: string | HTMLElement,
+    target: string | HTMLElement | null,
     options: WidgetPaymentsRevolutPayOptions
   ) => void
   on: <T extends RevolutPayEvents['type']>(