diff --git a/pay-java-ali/src/main/java/com/egzosn/pay/ali/api/AliPayService.java b/pay-java-ali/src/main/java/com/egzosn/pay/ali/api/AliPayService.java
index 14bc62d0bc438ddb506d77b6b84415a200c793a2..1e2e1f197f656b6a3526c826df3c202a8614191d 100644
--- a/pay-java-ali/src/main/java/com/egzosn/pay/ali/api/AliPayService.java
+++ b/pay-java-ali/src/main/java/com/egzosn/pay/ali/api/AliPayService.java
@@ -503,7 +503,7 @@ public class AliPayService extends BasePayService<AliPayConfigStorage> implement
         OrderParaStructure.loadParameters(bizContent, "query_options", assistOrder);
 
         //设置请求参数的集合
-        parameters.put(BIZ_CONTENT, JSON.toJSONString(getBizContent(assistOrder.getOutTradeNo(), assistOrder.getTradeNo(), bizContent)));
+        parameters.put(BIZ_CONTENT, JSON.toJSONString(getBizContent(assistOrder.getTradeNo(), assistOrder.getOutTradeNo(), bizContent)));
         //设置签名
         setSign(parameters);
         return requestTemplate.getForObject(getReqUrl(assistOrder.getTransactionType()) + "?" + UriVariables.getMapToParameters(parameters), JSONObject.class);
diff --git a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/DefaultWxPayAssistService.java b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/DefaultWxPayAssistService.java
index 6e7703ec147b826826a78bc5fdedf608ffc3791b..3bf1e68747f22956670356057ef6f1eb46296356 100644
--- a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/DefaultWxPayAssistService.java
+++ b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/DefaultWxPayAssistService.java
@@ -5,6 +5,7 @@ import java.nio.charset.StandardCharsets;
 import java.security.cert.Certificate;
 import java.util.Map;
 
+import org.apache.http.Header;
 import org.apache.http.HttpEntity;
 import org.apache.http.entity.ContentType;
 import org.apache.http.message.BasicHeader;
@@ -105,6 +106,17 @@ public class DefaultWxPayAssistService implements WxPayAssistService {
         if (statusCode >= 400) {
             throw new PayErrorException(new WxPayError(responseBody.getString(WxConst.CODE), responseBody.getString(WxConst.MESSAGE), responseBody.toJSONString()));
         }
+        Header[] headers = responseEntity.getHeaders();
+        if (headers == null) {
+            return responseBody;
+        }
+        for (Header header : headers) {
+            if ("Wechatpay-Serial".equals(header.getName())) {
+                // 更新平台证书的序列号，需要每次都更新，因为这个可能会改变
+                payConfigStorage.getCertEnvironment().setPlatformSerialNumber(header.getValue());
+                break;
+            }
+        }
         return responseBody;
     }
 
diff --git a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
index 36c2a898c1fb32780381bfe76b234160ad2b255e..3a25ab537e1a8b4d8d8f33ca2a2514cc7d98a392 100644
--- a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
+++ b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
@@ -657,7 +657,8 @@ public class WxPayService extends BasePayService<WxPayConfigStorage> implements
             return null;
         }
 
-        String serialNumber = payConfigStorage.getCertEnvironment().getSerialNumber();
+        // 商户上送敏感信息时使用`微信支付平台公钥`加密
+        String serialNumber = payConfigStorage.getCertEnvironment().getPlatformSerialNumber();
         Certificate certificate = getAssistService().getCertificate(serialNumber);
         return transferDetails.stream()
                 .peek(transferDetailListItem -> {
diff --git a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/bean/CertEnvironment.java b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/bean/CertEnvironment.java
index eed1c5bd602357b94288188bd9439d6fec6d69a1..c1c436021ef1f91f52e9c55113811131da9f45f3 100644
--- a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/bean/CertEnvironment.java
+++ b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/bean/CertEnvironment.java
@@ -26,7 +26,10 @@ public class CertEnvironment {
      */
     private String serialNumber;
 
-
+    /**
+     * 微信平台证书序列号
+     */
+    private String platformSerialNumber;
 
 
 
@@ -63,4 +66,12 @@ public class CertEnvironment {
     public void setSerialNumber(String serialNumber) {
         this.serialNumber = serialNumber;
     }
-}
\ No newline at end of file
+
+    public String getPlatformSerialNumber() {
+        return platformSerialNumber;
+    }
+
+    public void setPlatformSerialNumber(String platformSerialNumber) {
+        this.platformSerialNumber = platformSerialNumber;
+    }
+}