diff --git a/README.md b/README.md
index 445f3b2..66a3df8 100644
--- a/README.md
+++ b/README.md
@@ -72,11 +72,13 @@ By default, GoTTY starts a web server at port 8080. Open the URL on your web bro
    --once                        Accept only one client and exit on disconnection (default: false) [$GOTTY_ONCE]
    --timeout value               Timeout seconds for waiting a client(0 to disable) (default: 0) [$GOTTY_TIMEOUT]
    --permit-arguments            Permit clients to send command line arguments in URL (e.g. http://example.com:8080/?arg=AAA&arg=BBB) (default: false) [$GOTTY_PERMIT_ARGUMENTS]
+   --pass-headers                Pass HTTP request headers as environment variables (e.g. Cookie becomes HTTP_COOKIE) (default: false) [$GOTTY_PASS_HEADERS]
    --width value                 Static width of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_WIDTH]
    --height value                Static height of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_HEIGHT]
    --ws-origin value             A regular expression that matches origin URLs to be accepted by WebSocket. No cross origin requests are acceptable by default [$GOTTY_WS_ORIGIN]
    --ws-query-args value         Querystring arguments to append to the websocket instantiation [$GOTTY_WS_QUERY_ARGS]
    --enable-webgl                Enable WebGL renderer (default: true) [$GOTTY_ENABLE_WEBGL]
+   --quiet                       Don't log (default: false) [$GOTTY_QUIET]
    --close-signal value          Signal sent to the command process when gotty close it (default: SIGHUP) (default: 1) [$GOTTY_CLOSE_SIGNAL]
    --close-timeout value         Time in seconds to force kill process after client is disconnected (default: -1) (default: -1) [$GOTTY_CLOSE_TIMEOUT]
    --config value                Config file path (default: "~/.gotty") [$GOTTY_CONFIG]