diff --git a/Lagrange.Core/Internal/Service/System/FetchUserInfoService.cs b/Lagrange.Core/Internal/Service/System/FetchUserInfoService.cs
index 92a265967..e9cb5f04e 100644
--- a/Lagrange.Core/Internal/Service/System/FetchUserInfoService.cs
+++ b/Lagrange.Core/Internal/Service/System/FetchUserInfoService.cs
@@ -125,7 +125,7 @@ protected override bool Parse(Span<byte> input, BotKeystore keystore, BotAppInfo
         var info = new BotUserInfo(
             payload.Body.Body.Uin,
             nickname,
-            $"{avatars.Url}0",
+            $"{avatars.Url}640",
             birthday,
             city,
             country,