diff --git a/README.md b/README.md
index c16d125..7e9ccad 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,7 @@ eu3.sec-tunnel.com,77.111.244.22,443
 | api-login | String | SurfEasy API login (default "se0316") |
 | api-password | String | SurfEasy API password (default "SILrMEPBmJuhomxWkfm3JalqHX2Eheg1YhlEZiMh8II") |
 | bind-address | String | HTTP proxy listen address (default "127.0.0.1:18080") |
+| bootstrap-dns | String | DNS/DoH/DoT/DoQ resolver for initial discovering of SurfEasy API address. See https://github.com/ameshkov/dnslookup/ for upstream DNS URL format. Examples: `https://1.1.1.1/dns-query`, `quic://dns.adguard.com` |
 | country | String | desired proxy location (default "EU") |
 | list-countries | - | list available countries and exit |
 | list-proxies | - | output proxy list and exit |