diff --git a/app/Models/ProductCharacteristicsMaster.php b/app/Models/ProductCharacteristicsMaster.php
index ecf6a3e..e1ea430 100644
--- a/app/Models/ProductCharacteristicsMaster.php
+++ b/app/Models/ProductCharacteristicsMaster.php
@@ -23,6 +23,7 @@ class ProductCharacteristicsMaster extends Model
         'upper',
         'lower',
         'middle',
+        'category',
         'created_at',
         'updated_at',
         'created_by',