diff --git a/server/options.go b/server/options.go
index b51b03f..b03d78d 100644
--- a/server/options.go
+++ b/server/options.go
@@ -26,7 +26,7 @@ type Options struct {
 	Once                bool   `hcl:"once" flagName:"once" flagDescribe:"Accept only one client and exit on disconnection" default:"false"`
 	Timeout             int    `hcl:"timeout" flagName:"timeout" flagDescribe:"Timeout seconds for waiting a client(0 to disable)" default:"0"`
 	PermitArguments     bool   `hcl:"permit_arguments" flagName:"permit-arguments" flagDescribe:"Permit clients to send command line arguments in URL (e.g. http://example.com:8080/?arg=AAA&arg=BBB)" default:"false"`
-	PassHeaders         bool   `hcl:"pass_headers" flagName:"pass-headers" flagDescribe:"Pass HTTP request headers as environment variables (e.g. Host becomes HTTP_HOST)" default:"false"` 
+	PassHeaders         bool   `hcl:"pass_headers" flagName:"pass-headers" flagDescribe:"Pass HTTP request headers as environment variables (e.g. Cookie becomes HTTP_COOKIE)" default:"false"` 
 	Width               int    `hcl:"width" flagName:"width" flagDescribe:"Static width of the screen, 0(default) means dynamically resize" default:"0"`
 	Height              int    `hcl:"height" flagName:"height" flagDescribe:"Static height of the screen, 0(default) means dynamically resize" default:"0"`
 	WSOrigin            string `hcl:"ws_origin" flagName:"ws-origin" flagDescribe:"A regular expression that matches origin URLs to be accepted by WebSocket. No cross origin requests are acceptable by default" default:""`