diff --git a/go.mod b/go.mod
index 1e5607e..b758b1a 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/pkg/errors v0.8.1
 	github.com/urfave/cli v1.21.0
 	github.com/xtaci/kcp-go/v5 v5.5.4
-	github.com/xtaci/smux v1.5.8
+	github.com/xtaci/smux v1.5.9
 	github.com/xtaci/tcpraw v1.2.25
 	golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413
 )
diff --git a/go.sum b/go.sum
index 63a00e9..32ec2f0 100644
--- a/go.sum
+++ b/go.sum
@@ -47,6 +47,8 @@ github.com/xtaci/smux v1.5.7 h1:fVOjux34i112nzp5BIF7yg4WvVKLj1pUMqEgSdiBho4=
 github.com/xtaci/smux v1.5.7/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
 github.com/xtaci/smux v1.5.8 h1:qyXDeYtjmAnSLqmptfgebpD1Wx1KPMF39POSfx0klDw=
 github.com/xtaci/smux v1.5.8/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
+github.com/xtaci/smux v1.5.9 h1:Sysv8NISQoULTQut7Cj4RIb3jVP/WMw5nYGgvSSTWKo=
+github.com/xtaci/smux v1.5.9/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
 github.com/xtaci/tcpraw v1.2.25 h1:VDlqo0op17JeXBM6e2G9ocCNLOJcw9mZbobMbJjo0vk=
 github.com/xtaci/tcpraw v1.2.25/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=