diff --git a/docs/configuration/subscription.md b/docs/configuration/subscription.md
index b3374f4..5ae1ae1 100644
--- a/docs/configuration/subscription.md
+++ b/docs/configuration/subscription.md
@@ -43,7 +43,7 @@ Subscription URL.
 
 User-Agent in HTTP request.
 
-`ClashForAndroid/serenity` is used by default.
+`serenity/$version (sing-box $sing-box-version; Clash compatible)` is used by default.
 
 #### process