diff --git a/bin/update_reality_dest.sh b/bin/update_reality_dest.sh
index 91d0809..fb991c5 100644
--- a/bin/update_reality_dest.sh
+++ b/bin/update_reality_dest.sh
@@ -5,7 +5,19 @@ update_reality_dest(){
     local config_dir="$script_dir/../conf"
 
     local domain=$1
-    sed -i "s/你的reality_dest/$domain/g" "$config_dir/config.json"
+    local dest="$domain"
+
+    # 如果未指定端口号默认加上 :443
+    if [[ "$domain" != *:* ]]; then
+        dest="${domain}:443"
+    fi
+
+    # 修改配置文件的dest
+    modify_json_file "$config_dir/config.json" ".inbounds[0].streamSettings.realitySettings.dest" "$dest"
+
+    # 修改配置文件的serverNames
+    modify_json_file "$config_dir/config.json" ".inbounds[0].streamSettings.realitySettings.serverNames" "[\"$domain\"]"
+
     echo "修改realty_dest成功"
 }