diff --git a/README.md b/README.md
index 0614af8d..5418de1f 100644
--- a/README.md
+++ b/README.md
@@ -81,12 +81,12 @@ DEMO代码地址：[https://github.com/alibaba/easyexcel/blob/master/src/test/ja
     @GetMapping("download")
     public void download(HttpServletResponse response) throws IOException {
         // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
-        response.setContentType("application/vnd.ms-excel");
+        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
         response.setCharacterEncoding("utf-8");
         // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
         String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20");
         response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
-        EasyExcel.write(response.getOutputStream(), DownloadData.class).sheet("模板").doWrite(data());
+        EasyExcel.write(response.getOutputStream(), DownloadData.class).excelType(ExcelTypeEnum.XLSX).sheet("模板").doWrite(data());
     }
 
     /**
diff --git a/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java b/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java
index ab0ad968..e2c14137 100644
--- a/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java
+++ b/src/test/java/com/alibaba/easyexcel/test/demo/web/WebTest.java
@@ -18,6 +18,7 @@ import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.multipart.MultipartFile;
 
 import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.support.ExcelTypeEnum;
 import com.alibaba.fastjson.JSON;
 
 /**
@@ -43,12 +44,12 @@ public class WebTest {
     @GetMapping("download")
     public void download(HttpServletResponse response) throws IOException {
         // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
-        response.setContentType("application/vnd.ms-excel");
+        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
         response.setCharacterEncoding("utf-8");
         // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
         String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20");
         response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
-        EasyExcel.write(response.getOutputStream(), DownloadData.class).sheet("模板").doWrite(data());
+        EasyExcel.write(response.getOutputStream(), DownloadData.class).excelType(ExcelTypeEnum.XLSX).sheet("模板").doWrite(data());
     }
 
     /**
@@ -60,13 +61,13 @@ public class WebTest {
     public void downloadFailedUsingJson(HttpServletResponse response) throws IOException {
         // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
         try {
-            response.setContentType("application/vnd.ms-excel");
+            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
             response.setCharacterEncoding("utf-8");
             // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
             String fileName = URLEncoder.encode("测试", "UTF-8").replaceAll("\\+", "%20");
             response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
             // 这里需要设置不关闭流
-            EasyExcel.write(response.getOutputStream(), DownloadData.class).autoCloseStream(Boolean.FALSE).sheet("模板")
+            EasyExcel.write(response.getOutputStream(), DownloadData.class).excelType(ExcelTypeEnum.XLSX).autoCloseStream(Boolean.FALSE).sheet("模板")
                 .doWrite(data());
         } catch (Exception e) {
             // 重置response