diff --git a/server/src/api/controllers/Purchases/Bills.ts b/server/src/api/controllers/Purchases/Bills.ts
index 92feb1603..ad8d75c07 100644
--- a/server/src/api/controllers/Purchases/Bills.ts
+++ b/server/src/api/controllers/Purchases/Bills.ts
@@ -111,8 +111,8 @@ export default class BillsController extends BaseController {
       check('entries.*.item_id').exists().isNumeric().toInt(),
       check('entries.*.rate').exists().isNumeric().toFloat(),
       check('entries.*.quantity').exists().isNumeric().toFloat(),
-      check('entries.*.discount').optional().isNumeric().toFloat(),
-      check('entries.*.description').optional().trim().escape(),
+      check('entries.*.discount').optional({ nullable: true }).isNumeric().toFloat(),
+      check('entries.*.description').optional({ nullable: true }).trim().escape(),
     ];
   }