diff --git a/src/components/Grid.tsx b/src/components/Grid.tsx
index c2c4f2b3..3a5feefd 100644
--- a/src/components/Grid.tsx
+++ b/src/components/Grid.tsx
@@ -37,9 +37,9 @@ export interface GridProps {
   autoSelectFirstRow?: boolean;
   onColumnMoved?: GridOptions["onColumnMoved"];
   alwaysShowVerticalScroll?: boolean;
-  onGridSizeChanged: GridOptions["onGridSizeChanged"];
-  onFirstDataRendered: GridOptions["onFirstDataRendered"];
-  suppressColumnVirtualization: GridOptions["suppressColumnVirtualisation"];
+  onGridSizeChanged?: GridOptions["onGridSizeChanged"];
+  onFirstDataRendered?: GridOptions["onFirstDataRendered"];
+  suppressColumnVirtualization?: GridOptions["suppressColumnVirtualisation"];
 }
 
 /**