diff --git a/upgrade.sh b/upgrade.sh
index 19b96f1..3cb28f9 100644
--- a/upgrade.sh
+++ b/upgrade.sh
@@ -9,6 +9,7 @@ FILES=(
     "/etc/hysteria/traffic_data.json"
     "/etc/hysteria/config.json"
     "/etc/hysteria/core/scripts/telegrambot/.env"
+    "/etc/hysteria/core/scripts/singbox/.env"
 )
 
 echo "Backing up files to $TEMP_DIR"