diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/alipay/AliPayConfiguration.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/alipay/AliPayConfiguration.java
index 564089c..418d4ca 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/alipay/AliPayConfiguration.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/alipay/AliPayConfiguration.java
@@ -77,8 +77,8 @@ public class AliPayConfiguration {
     private String appRSAPrivateKey(String classPath) {
         ClassPathResource resource = new ClassPathResource(classPath);
         try {
-            FileReader in = new FileReader(resource.getFile());
-            try(BufferedReader bufferedReader = new BufferedReader(in)){
+            InputStreamReader inputStreamReader = new InputStreamReader(resource.getInputStream());
+            try(BufferedReader bufferedReader = new BufferedReader(inputStreamReader)){
                 return bufferedReader.readLine();
             }
         } catch (IOException e) {