diff --git a/types/youtube-player/dist/types.d.ts b/types/youtube-player/dist/types.d.ts
index d02a380589..20f857ac45 100644
--- a/types/youtube-player/dist/types.d.ts
+++ b/types/youtube-player/dist/types.d.ts
@@ -33,7 +33,7 @@ export interface Options {
         widget_referrer?: string,
     };
     events?: {
-        [eventType in EventType]: (event: CustomEvent) => void
+        [eventType in EventType]?: (event: CustomEvent) => void
     };
 }