diff --git a/billing/views.py b/billing/views.py
index 2d3469d..f2922a9 100644
--- a/billing/views.py
+++ b/billing/views.py
@@ -386,7 +386,7 @@ class VerifyTopupPaymentAPIView(StaffEditorPermissionMixin, generics.UpdateAPIVi
         data = {
             "benefName": f"{user.first_name} {user.last_name}",  # type: ignore
             "accountNo": user.acc_no,  # type: ignore
-            "absAmount": topup_instance.amount.toFixed(2),  # type: ignore
+            "absAmount": "{:.2f}".format(topup_instance.amount),
             "time": localtime(topup_instance.created_at).strftime("%Y-%m-%d %H:%M"),
         }
         logger.info(