diff --git a/src/types/slides.ts b/src/types/slides.ts
index b39a4ec7..80987920 100644
--- a/src/types/slides.ts
+++ b/src/types/slides.ts
@@ -692,7 +692,7 @@ export interface Note {
 export interface Slide {
   id: string
   elements: PPTElement[]
-  notes: Note[]
+  notes?: Note[]
   remark?: string
   background?: SlideBackground
   animations?: PPTAnimation[]