diff --git a/src/index.ts b/src/index.ts
index 6ebaf68..735ec8e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -68,7 +68,7 @@ export type WorkSheetOptions = {
 export type WorkSheet<T = unknown> = {
   name: string;
   data: T[][];
-  options: WorkSheetOptions;
+  options?: WorkSheetOptions;
 };
 
 export type BuildOptions = WorkSheetOptions & {