diff --git a/.travis.yml b/.travis.yml
index 49f08d3..15fc6d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: go
 
 go:
-  # - "1.12.x"
+  - "1.12.x"
   - master
diff --git a/README.md b/README.md
index 54d848c..f499073 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ Binary:
 
 - [https://github.com/nadoo/glider/releases](https://github.com/nadoo/glider/releases)
 
-Go Get (requires **Go 1.10+** ):
+Go Get (requires **Go 1.12+** ):
 
 ```bash
 go get -u github.com/nadoo/glider
diff --git a/conf.go b/conf.go
index 57539be..70bb0ff 100644
--- a/conf.go
+++ b/conf.go
@@ -57,13 +57,13 @@ func confInit() {
 	flag.Usage = usage
 	err := flag.Parse()
 	if err != nil {
-		flag.Usage()
+		// flag.Usage()
 		fmt.Fprintf(os.Stderr, "ERROR: %s\n", err)
 		os.Exit(-1)
 	}
 
 	if len(conf.Listen) == 0 && conf.DNS == "" {
-		flag.Usage()
+		// flag.Usage()
 		fmt.Fprintf(os.Stderr, "ERROR: listen url must be specified.\n")
 		os.Exit(-1)
 	}
diff --git a/go.mod b/go.mod
index 4b35d62..f20c5f5 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/dgryski/go-rc2 v0.0.0-20150621095337-8a9021637152 // indirect
 	github.com/ebfe/rc2 v0.0.0-20131011165748-24b9757f5521 // indirect
 	github.com/klauspost/cpuid v1.2.0 // indirect
-	github.com/klauspost/reedsolomon v1.8.0 // indirect
+	github.com/klauspost/reedsolomon v1.9.0 // indirect
 	github.com/nadoo/conflag v0.1.0
 	github.com/nadoo/go-shadowsocks2 v0.1.0
 	github.com/pkg/errors v0.8.1 // indirect
@@ -18,10 +18,10 @@ require (
 	github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 // indirect
 	github.com/templexxx/xor v0.0.0-20181023030647-4e92f724b73b // indirect
 	github.com/tjfoc/gmsm v1.0.1 // indirect
-	github.com/xtaci/kcp-go v5.0.4+incompatible
-	golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc
-	golang.org/x/net v0.0.0-20181220203305-927f97764cc3 // indirect
-	golang.org/x/sys v0.0.0-20190105165716-badf5585203e // indirect
+	github.com/xtaci/kcp-go v5.0.7+incompatible
+	golang.org/x/crypto v0.0.0-20190228161510-8dd112bcdc25
+	golang.org/x/net v0.0.0-20190227160552-c95aed5357e7 // indirect
+	golang.org/x/sys v0.0.0-20190228124157-a34e9553db1e // indirect
 )
 
 // Replace dependency modules with local developing copy
diff --git a/go.sum b/go.sum
index 55d999c..fbb4eed 100644
--- a/go.sum
+++ b/go.sum
@@ -14,6 +14,8 @@ github.com/klauspost/cpuid v1.2.0 h1:NMpwD2G9JSFOE1/TJjGSo5zG7Yb2bTe7eq1jH+irmeE
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
 github.com/klauspost/reedsolomon v1.8.0 h1:lvvOkvk64cE1EGbBIgFk7WSOOsI1GexpuLiT7zjab6g=
 github.com/klauspost/reedsolomon v1.8.0/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
+github.com/klauspost/reedsolomon v1.9.0 h1:usyTY5K7D2B6WOHn2jmpB7ky8Qom96mShZmmq3OW4JU=
+github.com/klauspost/reedsolomon v1.9.0/go.mod h1:CwCi+NUr9pqSVktrkN+Ondf06rkhYZ/pcNv7fu+8Un4=
 github.com/nadoo/conflag v0.1.0 h1:m9xSrL0UILGXPCZW66mhW57V2D2IraVpWLNIr2Op8X8=
 github.com/nadoo/conflag v0.1.0/go.mod h1:C3xchp3tIA3J2haACChSHFrlih7w00f31DXfjVUQa+0=
 github.com/nadoo/go-shadowsocks2 v0.1.0 h1:NkdUrZrI8uYq8R0YDmHLttLqKt0Z9i7dUKtGvBqZQl8=
@@ -36,19 +38,28 @@ github.com/xtaci/kcp-go v5.0.2+incompatible h1:Nj5VlOVO2gQ+QWgItWA2yP8X+SGxdV3SD
 github.com/xtaci/kcp-go v5.0.2+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/kcp-go v5.0.4+incompatible h1:zCX9MJxfJcfynNsUdyZnq8mbJVBNvuaZaf47mqd45Mk=
 github.com/xtaci/kcp-go v5.0.4+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
+github.com/xtaci/kcp-go v5.0.7+incompatible h1:zs9tc8XRID0m+aetu3qPWZFyRt2UIMqbXIBgw+vcnlE=
+github.com/xtaci/kcp-go v5.0.7+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9 h1:mKdxBk7AujPs8kU4m80U72y/zjbZ3UcXC7dClwKbUI0=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190102171810-8d7daa0c54b3 h1:35ZwriXqdZtBGoFgUpW71Z7xz5o23fRpWHFAO2PlnIA=
 golang.org/x/crypto v0.0.0-20190102171810-8d7daa0c54b3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc h1:F5tKCVGp+MUAHhKp5MZtGqAlGX3+oCsiL1Q629FL90M=
 golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20190228161510-8dd112bcdc25 h1:jsG6UpNLt9iAsb0S2AGW28DveNzzgmbXR+ENoPjUeIU=
+golang.org/x/crypto v0.0.0-20190228161510-8dd112bcdc25/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20181217023233-e147a9138326 h1:iCzOf0xz39Tstp+Tu/WwyGjUXCk34QhQORRxBeXXTA4=
 golang.org/x/net v0.0.0-20181217023233-e147a9138326/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3 h1:eH6Eip3UpmR+yM/qI9Ijluzb1bNv/cAU/n+6l8tRSis=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190227160552-c95aed5357e7 h1:C2F/nMkR/9sfUTpvR3QrjBuTdvMUC/cFajkphs1YLQo=
+golang.org/x/net v0.0.0-20190227160552-c95aed5357e7/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sys v0.0.0-20181218192612-074acd46bca6 h1:MXtOG7w2ND9qNCUZSDBGll/SpVIq7ftozR9I8/JGBHY=
 golang.org/x/sys v0.0.0-20181218192612-074acd46bca6/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190102155601-82a175fd1598 h1:S8GOgffXV1X3fpVG442QRfWOt0iFl79eHJ7OPt725bo=
 golang.org/x/sys v0.0.0-20190102155601-82a175fd1598/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190105165716-badf5585203e h1:34JZ+d5RsKTBgJnMpK4m6gzXRZ6H99pKveztnOI3+JA=
 golang.org/x/sys v0.0.0-20190105165716-badf5585203e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190228124157-a34e9553db1e h1:ZytStCyV048ZqDsWHiYDdoI2Vd4msMcrDECFxS+tL9c=
+golang.org/x/sys v0.0.0-20190228124157-a34e9553db1e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
diff --git a/proxy/http/http.go b/proxy/http/http.go
index af4e919..e37d704 100644
--- a/proxy/http/http.go
+++ b/proxy/http/http.go
@@ -242,6 +242,7 @@ func (s *HTTP) Dial(network, addr string) (net.Conn, error) {
 
 	var buf bytes.Buffer
 	buf.Write([]byte("CONNECT " + addr + " HTTP/1.1\r\n"))
+	// TODO: add host header for compatibility?
 	buf.Write([]byte("Proxy-Connection: Keep-Alive\r\n"))
 
 	if s.user != "" && s.password != "" {
diff --git a/proxy/obfs/tls.go b/proxy/obfs/tls.go
index 5b6e5f2..ffb070a 100644
--- a/proxy/obfs/tls.go
+++ b/proxy/obfs/tls.go
@@ -127,7 +127,7 @@ func (c *TLSObfsConn) handshake(b []byte) (int, error) {
 	buf := new(bytes.Buffer)
 
 	// prepare extension & clientHello content
-	bufExt, bufHello := extention(b, c.obfsHost), clientHello()
+	bufExt, bufHello := extension(b, c.obfsHost), clientHello()
 
 	// prepare lengths
 	extLen := bufExt.Len()
@@ -217,7 +217,7 @@ func clientHello() *bytes.Buffer {
 	return buf
 }
 
-func extention(b []byte, server string) *bytes.Buffer {
+func extension(b []byte, server string) *bytes.Buffer {
 	buf := new(bytes.Buffer)
 
 	// Extension: SessionTicket TLS