diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/SignatureExec.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/SignatureExec.java
index ebf3d75aa..24d6f26eb 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/SignatureExec.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/v3/SignatureExec.java
@@ -54,8 +54,9 @@ public class SignatureExec implements ClientExecChain {
 
   @Override
   public CloseableHttpResponse execute(HttpRoute route, HttpRequestWrapper request,
-      HttpClientContext context, HttpExecutionAware execAware) throws IOException, HttpException {
-    if (request.getURI().getHost().endsWith(".mch.weixin.qq.com")) {
+                                       HttpClientContext context, HttpExecutionAware execAware)
+    throws IOException, HttpException {
+    if (request.getURI().getHost() != null && request.getURI().getHost().endsWith(".mch.weixin.qq.com")) {
       return executeWithSignature(route, request, context, execAware);
     } else {
       return mainExec.execute(route, request, context, execAware);
@@ -63,7 +64,8 @@ public class SignatureExec implements ClientExecChain {
   }
 
   private CloseableHttpResponse executeWithSignature(HttpRoute route, HttpRequestWrapper request,
-      HttpClientContext context, HttpExecutionAware execAware) throws IOException, HttpException {
+                                                     HttpClientContext context, HttpExecutionAware execAware)
+    throws IOException, HttpException {
     // 上传类不需要消耗两次故不做转换
     if (!(request.getOriginal() instanceof WechatPayUploadHttpPost)) {
       convertToRepeatableRequestEntity(request);