diff --git a/app/api/services/loan_service.py b/app/api/services/loan_service.py
index 4a1fd2f..67dbef4 100644
--- a/app/api/services/loan_service.py
+++ b/app/api/services/loan_service.py
@@ -141,9 +141,9 @@ class LoanService:
                     'product_id': loan.product_id,
                     'default_penalty_fee': loan.default_penalty_fee,
                     'continuous_fee': loan.continuous_fee,
-                    'upfront_fee': self.upfront_fee,
-                    'repayment_amount': self.repayment_amount,
-                    'installment_amount': self.installment_amount,
+                    'upfront_fee': loan.upfront_fee,
+                    'repayment_amount': loan.repayment_amount,
+                    'installment_amount': loan.installment_amount,
                     'due_date': loan.due_date.isoformat() if loan.due_date else None,
                     'created_at': loan.created_at.isoformat() if loan.created_at else None,
                     'updated_at': loan.updated_at.isoformat() if loan.updated_at else None