diff --git a/src/views/portal/case/Detail.vue b/src/views/portal/case/Detail.vue
index bf733d64..f485b2ec 100644
--- a/src/views/portal/case/Detail.vue
+++ b/src/views/portal/case/Detail.vue
@@ -329,7 +329,7 @@ export default {
         timedOut = true;
         xmlhttp.abort();
       }, 5000);
-      xmlhttp.open("HEAD", window.location.protocol + "//uapi.boe.com.cn", true);
+      xmlhttp.open("HEAD", window.location.protocol + "//uapi.boe.com.cn/500.html", true);
       xmlhttp.send();
       xmlhttp.onreadystatechange = function () {
         if (xmlhttp.readyState == 4) {