diff --git a/go.mod b/go.mod
index 234bbe1..726c94c 100644
--- a/go.mod
+++ b/go.mod
@@ -9,11 +9,11 @@ require (
 	github.com/templexxx/xor v0.0.0-20181023030647-4e92f724b73b // indirect
 	github.com/tjfoc/gmsm v1.0.1 // indirect
 	github.com/urfave/cli v1.20.0
-	github.com/xtaci/kcp-go v5.3.7+incompatible
-	github.com/xtaci/smux v1.2.11
-	golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529
+	github.com/xtaci/kcp-go v5.3.8+incompatible
+	github.com/xtaci/smux v1.2.12
+	golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f
 	golang.org/x/net v0.0.0-20190509222800-a4d6f7feada5 // indirect
 	golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862 // indirect
 	golang.org/x/text v0.3.2 // indirect
-	golang.org/x/tools v0.0.0-20190511041617-99f201b6807e // indirect
+	golang.org/x/tools v0.0.0-20190513233021-7d589f28aaf4 // indirect
 )
diff --git a/go.sum b/go.sum
index a400846..e708421 100644
--- a/go.sum
+++ b/go.sum
@@ -50,6 +50,8 @@ github.com/xtaci/kcp-go v5.3.6+incompatible h1:g3/sc8dtbFG6td3W7BTyJNr/5Sb0zMNBF
 github.com/xtaci/kcp-go v5.3.6+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/kcp-go v5.3.7+incompatible h1:iWiEoXj7BnFNR1XUPAQssR8DJGw9E7BE0l1rqFCAi3Y=
 github.com/xtaci/kcp-go v5.3.7+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
+github.com/xtaci/kcp-go v5.3.8+incompatible h1:1f9hBNbkoMfLryf0P82GzrMkSkqBLUztOmmqKqh7XxM=
+github.com/xtaci/kcp-go v5.3.8+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/smux v1.1.1 h1:ZyIo9XHuHkAeENzHR8yGWC+6xUSCTeP2tPTRE8mnLvc=
 github.com/xtaci/smux v1.1.1/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
 github.com/xtaci/smux v1.1.2 h1:AeAzHKqvDeFEcicL9Q06LTjIVW2I55iooUbpDRGHth4=
@@ -74,6 +76,8 @@ github.com/xtaci/smux v1.2.10 h1:DQiH08XfO+33X7l5XOGV5urQHrgK8PRFWYxT/z9Hrnw=
 github.com/xtaci/smux v1.2.10/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
 github.com/xtaci/smux v1.2.11 h1:QI4M2HgkkpsVU3Bfcmyx10qURBEeHfKi7xDhGEORfu0=
 github.com/xtaci/smux v1.2.11/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
+github.com/xtaci/smux v1.2.12 h1:POGYLDuR61+XZlVzKUdI4fTLtJnyVba++XS4Q6T5e3M=
+github.com/xtaci/smux v1.2.12/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190320223903-b7391e95e576 h1:aUX/1G2gFSs4AsJJg2cL3HuoRhCSCz733FE5GUSuaT4=
 golang.org/x/crypto v0.0.0-20190320223903-b7391e95e576/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -94,6 +98,8 @@ golang.org/x/crypto v0.0.0-20190506204251-e1dfcc566284 h1:rlLehGeYg6jfoyz/eDqDU1
 golang.org/x/crypto v0.0.0-20190506204251-e1dfcc566284/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529 h1:iMGN4xG0cnqj3t+zOM8wUB0BiPKHEwSxEZCvzcbZuvk=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f h1:R423Cnkcp5JABoeemiGEPlt9tHXFfw5kvc0yqlxRPWo=
+golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53 h1:kcXqo9vE6fsZY5X5Rd7R1l7fTgnWaDCVmln65REefiE=
 golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -134,3 +140,4 @@ golang.org/x/tools v0.0.0-20190424031103-cb2dda6eabdf/go.mod h1:RgjU9mgBXZiqYHBn
 golang.org/x/tools v0.0.0-20190428024724-550556f78a90/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190509153222-73554e0f7805/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190511041617-99f201b6807e/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190513233021-7d589f28aaf4/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=