diff --git a/jero-boot-module-system/src/main/java/com/jero/modules/system/controller/CommonController.java b/jero-boot-module-system/src/main/java/com/jero/modules/system/controller/CommonController.java
index ce1d79a6..cfd4ddeb 100644
--- a/jero-boot-module-system/src/main/java/com/jero/modules/system/controller/CommonController.java
+++ b/jero-boot-module-system/src/main/java/com/jero/modules/system/controller/CommonController.java
@@ -172,8 +172,10 @@ public class CommonController {
             response.setContentType("application/force-download");// 设置强制下载不打开
             if (type == null) {
                 fileName = StringUtils.lowerCase(fileName);
-                if (fileName.contains(".jpg") || fileName.contains(".gif") || fileName.contains(".jpeg")||fileName.contains(".png")) {
+                if (fileName.contains(".jpg") || fileName.contains(".gif") || fileName.contains(".jpeg")) {
                     response.setContentType("image/jpeg;image/png;image/gif;image/jpg;");
+                }else if (fileName.contains(".png")){
+                    response.setContentType("image/png;");
                 }
             }
             outputStream = response.getOutputStream();