diff --git a/app/Classes/Modules/Transactions/Services/GeneratesTransactionBillNumber.php b/app/Classes/Modules/Transactions/Services/GeneratesTransactionBillNumber.php
index 4505707e..943da696 100644
--- a/app/Classes/Modules/Transactions/Services/GeneratesTransactionBillNumber.php
+++ b/app/Classes/Modules/Transactions/Services/GeneratesTransactionBillNumber.php
@@ -3,6 +3,7 @@
 namespace App\Classes\Modules\Transactions\Services;
 
 
+use App\Classes\Exceptions\InternalServerErrorException;
 use Carbon\Carbon;
 
 class GeneratesTransactionBillNumber
@@ -27,14 +28,21 @@ class GeneratesTransactionBillNumber
      * @return string
      */
     public function execute(string $prefix, ?Carbon $date = null): string {
-        if(!$date){
-            $date = carbon::now();
+        if (!$date) {
+            $date = Carbon::now();
         }
 
-        $billNumber = $prefix.$date->format('Y').$date->format('m').'-'.mt_rand(10000, 99999);
-
-        return !$this->checksIfTransactionBillNumberExists->execute($billNumber) ? $billNumber : self::execute($prefix);
+        $attempt = 0;
+        while ($attempt < 10) {  // Retry up to 10 times
+            $billNumber = $prefix . $date->format('Y') . $date->format('m') . '-' . microtime(true);
+            if (!$this->checksIfTransactionBillNumberExists->execute($billNumber)) {
+                return $billNumber;
+            }
+            $attempt++;
+        }
 
+        throw new InternalServerErrorException("Unable to generate unique bill number after {$attempt} attempts.");
     }
 
-}
\ No newline at end of file
+
+}