diff --git a/types/pdfmake/index.d.ts b/types/pdfmake/index.d.ts
index 3158ea2f5e..817ffdd32a 100644
--- a/types/pdfmake/index.d.ts
+++ b/types/pdfmake/index.d.ts
@@ -198,7 +198,7 @@ declare module "pdfmake/build/pdfmake" {
         ) => boolean;
         pageMargins?: Margins;
         pageOrientation?: PageOrientation;
-        pageSize?: PageSize;
+        pageSize?: PageSize | { width: number; height: number };
         styles?: Style;
     }