diff --git a/package/sudoers-v2rayn-core b/package/sudoers-v2rayn-core
index 547b08e2..f0121ce0 100644
--- a/package/sudoers-v2rayn-core
+++ b/package/sudoers-v2rayn-core
@@ -1,3 +1,4 @@
+Defaults!/opt/v2rayN/bin/sing_box/sing-box env_keep += "ENABLE_DEPRECATED_LEGACY_DNS_SERVERS"
 %v2rayn             ALL = (v2rayn-core) NOPASSWD: /opt/v2rayN/bin/sing_box/sing-box
 %v2rayn             ALL = (v2rayn-core) NOPASSWD: /opt/v2rayN/bin/hev_socks5_tunnel/hev-socks5-tunnel /opt/v2rayN/bin/hev_socks5_tunnel/v2rayn-tun.yaml
 %v2rayn             ALL = (root) NOPASSWD: /sbin/ip rule add pref 5000 not uidrange 785-785 lookup 6418