diff --git a/app/Http/Requests/Invoice/UpdateInvoiceRequest.php b/app/Http/Requests/Invoice/UpdateInvoiceRequest.php
index 9805160ab9e7..0a6992192e93 100644
--- a/app/Http/Requests/Invoice/UpdateInvoiceRequest.php
+++ b/app/Http/Requests/Invoice/UpdateInvoiceRequest.php
@@ -71,6 +71,7 @@ class UpdateInvoiceRequest extends Request
         $rules['tax_name1'] = 'bail|sometimes|string|nullable';
         $rules['tax_name2'] = 'bail|sometimes|string|nullable';
         $rules['tax_name3'] = 'bail|sometimes|string|nullable';
+        $rules['status_id'] = 'bail|sometimes|not_in:5'; //do not all cancelled invoices to be modfified.
 
         // not needed.
         // $rules['partial_due_date'] = 'bail|sometimes|required_unless:partial,0,null';
@@ -100,7 +101,8 @@ class UpdateInvoiceRequest extends Request
     public function messages()
     {
         return [
-            'id' => ctrans('text.locked_invoice'),
+            'id' => ctrans('texts.locked_invoice'),
+            'status_id' => ctrans('texts.locked_invoice'),
         ];
     }
 }