diff --git a/simnet/client/routes.py b/simnet/client/routes.py
index 191a424..0bc2ab9 100644
--- a/simnet/client/routes.py
+++ b/simnet/client/routes.py
@@ -245,7 +245,10 @@ WEB_ACCOUNT_URL = InternationalRoute(
     chinese="https://webapi.account.mihoyo.com/Api/",
 )
 
-AUTH_KEY_URL = InternationalRoute(overseas="", chinese="https://api-takumi.mihoyo.com/binding/api/genAuthKey")
+AUTH_KEY_URL = InternationalRoute(
+    overseas="https://sg-public-api.hoyoverse.com/binding/api/genAuthKey",
+    chinese="https://api-takumi.mihoyo.com/binding/api/genAuthKey",
+)
 
 HK4E_LOGIN_URL = InternationalRoute(
     overseas="https://sg-public-api.hoyoverse.com/common/badge/v1/login/account",