diff --git a/cmd/main.go b/cmd/main.go
index 5d3768b..da073f4 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -68,13 +68,13 @@ func registerInitFn(fn func()) {
 
 func init() {
 	// Main
-	args.Version = flag.Bool("version", false, "Show version")
+	args.Version = flag.Bool("version", false, "Show current version of tun2socks")
 	args.LogLevel = flag.String("loglevel", "info", "Logging level [info, warning, error, debug, silent]")
 	args.TunName = flag.String("tunName", "utun0", "TUN interface name")
-	args.TunAddr = flag.String("tunAddr", "240.0.0.2", "TUN interface address")
-	args.TunGw = flag.String("tunGw", "240.0.0.1", "TUN interface gateway")
-	args.TunMask = flag.String("tunMask", "255.255.255.0", "TUN interface netmask, it should be a prefix length (a number) for IPv6 address")
-	args.TunDNS = flag.String("tunDNS", "", "DNS resolvers for TUN interface (Windows Only)")
+	args.TunAddr = flag.String("tunAddr", "198.18.0.2", "TUN interface address")
+	args.TunGw = flag.String("tunGw", "198.18.0.1", "TUN interface gateway")
+	args.TunMask = flag.String("tunMask", "255.255.255.0", "TUN interface netmask")
+	args.TunDNS = flag.String("tunDNS", "8.8.8.8,8.8.4.4", "DNS resolvers for TUN interface (Windows Only)")
 
 	// Proxy
 	args.ProxyServer = flag.String("proxyServer", "", "Proxy server address")
diff --git a/cmd/main_fakedns.go b/cmd/main_fakedns.go
index 644cfb1..0b1c941 100644
--- a/cmd/main_fakedns.go
+++ b/cmd/main_fakedns.go
@@ -15,7 +15,7 @@ func init() {
 	args.FakeDNSAddr = flag.String("fakeDNSAddr", ":53", "Listen address of fake DNS")
 	args.FakeIPRange = flag.String("fakeIPRange", "198.18.0.0/15", "Fake IP CIDR range for DNS")
 	args.FakeDNSHosts = flag.String("fakeDNSHosts", "", "DNS hosts mapping, e.g. 'example.com=1.1.1.1,example.net=2.2.2.2'")
-	args.HijackDNS = flag.String("hijackDNS", "", "Hijack the DNS query to get a fake ip, e.g. '*:53' or '8.8.8.8:53,8.8.4.4:53'")
+	args.HijackDNS = flag.String("hijackDNS", "", "Hijack the specific DNS query to get a fake ip, e.g. '*:53', '8.8.8.8:53,8.8.4.4:53'")
 	args.BackendDNS = flag.String("backendDNS", "8.8.8.8:53,1.1.1.1:53", "Backend DNS to resolve !TypeA or !ClassINET query. (must support tcp)")
 
 	registerInitFn(func() {