diff --git a/DataRoom/dataroom-core/src/main/java/com/gccloud/dataroom/core/module/login/controller/SysLoginController.java b/DataRoom/dataroom-core/src/main/java/com/gccloud/dataroom/core/module/login/controller/SysLoginController.java
index 564c03ec93fffe64927c0a84fdc13bea4f78df1a..7c273765fe404d3f53d83b638d3188deab0684f4 100644
--- a/DataRoom/dataroom-core/src/main/java/com/gccloud/dataroom/core/module/login/controller/SysLoginController.java
+++ b/DataRoom/dataroom-core/src/main/java/com/gccloud/dataroom/core/module/login/controller/SysLoginController.java
@@ -62,7 +62,7 @@ public class SysLoginController {
         if (!UUID_PATTERN.matcher(uuid).matches()) {
             throw new GlobalException("uuid格式错误");
         }
-        response.setHeader("Cache-Control", "no-store, n o-cache∑");
+        response.setHeader("Cache-Control", "no-store, no-cache");
         response.setContentType("image/jpeg");
         Captcha captcha = null;
         int type = dataRoomConfig.getCaptcha().getType();