diff --git a/pay-java-paypal/README.md b/pay-java-paypal/README.md
index 5730273..5ca93d0 100644
--- a/pay-java-paypal/README.md
+++ b/pay-java-paypal/README.md
@@ -94,7 +94,7 @@
         order.setCurType(CurType.USD);
         order.setDescription(" description ");
         order.setTradeNo("paypal 平台的单号");
-        order.setRefundAmount(new BigDecimal(0.01));
+        order.setRefundAmount(BigDecimal.valueOf(0.01));
           RefundResult result =  service.refund(order);
 
 ```