diff --git a/app/Invoice.php b/app/Invoice.php
index 647b3bff..9e3bffa8 100644
--- a/app/Invoice.php
+++ b/app/Invoice.php
@@ -6,7 +6,7 @@ use Illuminate\Database\Eloquent\Model;
 
 class Invoice extends Model
 {
-    protected $fillable = ['invoice_url','amount','booking_id', 'buyer_company', 'address', 'contact_no', 'po_number'];
+    protected $fillable = ['invoice_url','amount','booking_id', 'buyer_company', 'address', 'contact_no', 'po_number', 'adjustment'];
 
     public function booking(){
         return $this->belongsTo('App\Booking');