diff --git a/helloasso_api_wrapper/models/statistics.py b/helloasso_api_wrapper/models/statistics.py
index 1180532..9f20dbc 100644
--- a/helloasso_api_wrapper/models/statistics.py
+++ b/helloasso_api_wrapper/models/statistics.py
@@ -255,7 +255,7 @@ class PaymentDetail(BaseModel):
     paymentReceiptUrl: str | None = None
     fiscalReceiptUrl: str | None = None
     id: int
-    amount: int | None = None
+    amount: int
     amountTip: int | None = None
     date: datetime | None = None
     paymentMeans: enums.PaymentMeans | None = None