diff --git a/internal/repository/purchase_order_repository.go b/internal/repository/purchase_order_repository.go
index 798eaca..d65cd6b 100644
--- a/internal/repository/purchase_order_repository.go
+++ b/internal/repository/purchase_order_repository.go
@@ -89,11 +89,11 @@ func (r *PurchaseOrderRepositoryImpl) List(ctx context.Context, organizationID u
 			}
 		case "start_date":
 			if startDate, ok := value.(time.Time); ok {
-				query = query.Where("created_at >= ?", startDate)
+				query = query.Where("transaction_date >= ?", startDate)
 			}
 		case "end_date":
 			if endDate, ok := value.(time.Time); ok {
-				query = query.Where("created_at <= ?", endDate)
+				query = query.Where("transaction_date <= ?", endDate)
 			}
 		default:
 			query = query.Where(key+" = ?", value)