diff --git a/go.mod b/go.mod
index 8a1872b..21cfff9 100644
--- a/go.mod
+++ b/go.mod
@@ -8,12 +8,12 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/tjfoc/gmsm v1.3.0 // indirect
 	github.com/urfave/cli v1.21.0
-	github.com/xtaci/kcp-go/v5 v5.5.7
+	github.com/xtaci/kcp-go/v5 v5.5.8
 	github.com/xtaci/smux v1.5.12
 	github.com/xtaci/tcpraw v1.2.25
 	golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d
 	golang.org/x/net v0.0.0-20200222125558-5a598a2470a0 // indirect
-	golang.org/x/sys v0.0.0-20200219091948-cb0a6d8edb6c // indirect
+	golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae // indirect
 )
 
 go 1.13
diff --git a/go.sum b/go.sum
index cbcfcc4..35e86e2 100644
--- a/go.sum
+++ b/go.sum
@@ -31,8 +31,8 @@ github.com/urfave/cli v1.21.0 h1:wYSSj06510qPIzGSua9ZqsncMmWE3Zr55KBERygyrxE=
 github.com/urfave/cli v1.21.0/go.mod h1:lxDj6qX9Q6lWQxIrbrT0nwecwUtRnhVZAJjJZrVUZZQ=
 github.com/xtaci/kcp-go v5.4.20+incompatible h1:TN1uey3Raw0sTz0Fg8GkfM0uH3YwzhnZWQ1bABv5xAg=
 github.com/xtaci/kcp-go v5.4.20+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
-github.com/xtaci/kcp-go/v5 v5.5.7 h1:6s+pxbQzsYAqaHKjoxLfvY9cYXPJOzkNzEJL/+fgy20=
-github.com/xtaci/kcp-go/v5 v5.5.7/go.mod h1:Oyw+zrBrO58urX1AaWV+2RynthEKcs+qrRAh0Q8YpdU=
+github.com/xtaci/kcp-go/v5 v5.5.8 h1:LgF/IvUDfRkXPbpv+zgPoks0VfEeBHaWNU/M1U0Q6sg=
+github.com/xtaci/kcp-go/v5 v5.5.8/go.mod h1:Oyw+zrBrO58urX1AaWV+2RynthEKcs+qrRAh0Q8YpdU=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae h1:J0GxkO96kL4WF+AIT3M4mfUVinOCPgf2uUWYFUzN0sM=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
 github.com/xtaci/smux v1.5.12 h1:n9OGjdqQuVZXLh46+L4IR5tR2wvuUFwRABnN/V55bIY=
@@ -55,8 +55,8 @@ golang.org/x/sys v0.0.0-20190405154228-4b34438f7a67/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8 h1:JA8d3MPx/IToSyXZG/RhwYEtfrKO1Fxrqe8KrkiLXKM=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200219091948-cb0a6d8edb6c h1:jceGD5YNJGgGMkJz79agzOln1K9TaZUjv5ird16qniQ=
-golang.org/x/sys v0.0.0-20200219091948-cb0a6d8edb6c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=