diff --git a/lib/getHost.js b/lib/getHost.js
index 022e071..b5e97b1 100644
--- a/lib/getHost.js
+++ b/lib/getHost.js
@@ -1,6 +1,6 @@
 let availableDomain = 'update.reactnative.cn';
 
-function ping(domain) {
+function ping(domain, rejectImmediate) {
   return new Promise((resolve, reject) => {
     const xhr = new XMLHttpRequest();
     xhr.onreadystatechange = e => {
@@ -10,7 +10,7 @@ function ping(domain) {
       if (xhr.status === 200) {
         resolve(domain);
       } else {
-        setTimeout(reject, 5000);
+        rejectImmediate ? reject() : setTimeout(reject, 5000);
       }
     };
     xhr.open('HEAD', `https://${domain}`);
@@ -26,7 +26,7 @@ function logger(...args) {
 
 export async function tryBackupDomains() {
   try {
-    await ping(availableDomain);
+    await ping(availableDomain, true);
     logger('main domain ok');
     return;
   } catch (e) {