diff --git a/app/Exports/Purchases/Sheets/Bills.php b/app/Exports/Purchases/Sheets/Bills.php
index 31ae588d6..63097e4fc 100644
--- a/app/Exports/Purchases/Sheets/Bills.php
+++ b/app/Exports/Purchases/Sheets/Bills.php
@@ -4,9 +4,10 @@ namespace App\Exports\Purchases\Sheets;
 
 use App\Abstracts\Export;
 use App\Models\Document\Document as Model;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
 use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 
-class Bills extends Export
+class Bills extends Export implements WithColumnFormatting
 {
     public function collection()
     {
diff --git a/app/Exports/Sales/Sheets/Invoices.php b/app/Exports/Sales/Sheets/Invoices.php
index 81319c97f..9dd7c8165 100644
--- a/app/Exports/Sales/Sheets/Invoices.php
+++ b/app/Exports/Sales/Sheets/Invoices.php
@@ -4,9 +4,10 @@ namespace App\Exports\Sales\Sheets;
 
 use App\Abstracts\Export;
 use App\Models\Document\Document as Model;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
 use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
 
-class Invoices extends Export
+class Invoices extends Export implements WithColumnFormatting
 {
     public function collection()
     {