diff --git a/app/Jobs/GenerateBiayaKartuCsvJob.php b/app/Jobs/GenerateBiayaKartuCsvJob.php
index 6814080..d02dac0 100644
--- a/app/Jobs/GenerateBiayaKartuCsvJob.php
+++ b/app/Jobs/GenerateBiayaKartuCsvJob.php
@@ -24,14 +24,15 @@
             'SILV'    => 5000,
             'GOLD'    => 10000
         ];
-        private const CSV_FILENAME = 'atmcards.csv';
+        // Changed from const to property
+        private $csvFilename;
 
         /**
          * Create a new job instance.
          */
         public function __construct()
         {
-            //
+            $this->csvFilename = env('BIAYA_KARTU_CSV_FILENAME', 'biaya_kartu_atm.csv');
         }
 
         /**
@@ -71,7 +72,7 @@
         : array
         {
             $cards    = $this->getEligibleAtmCards();
-            $filename = storage_path('app/' . self::CSV_FILENAME);
+            $filename = storage_path('app/' . $this->csvFilename);
 
             $handle = fopen($filename, 'w+');
             if (!$handle) {