diff --git a/go.mod b/go.mod
index c9d3f14..377d646 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/urfave/cli v1.21.0
 	github.com/xtaci/kcp-go/v5 v5.6.1
-	github.com/xtaci/smux v1.5.15
+	github.com/xtaci/smux v1.5.16
 	github.com/xtaci/tcpraw v1.2.25
 	golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de
 )
diff --git a/go.sum b/go.sum
index 524ef9e..e3b4ee0 100644
--- a/go.sum
+++ b/go.sum
@@ -42,6 +42,8 @@ github.com/xtaci/smux v1.5.14 h1:1j+zJYDZRv9FHaWqCJfH5RPizIm0fSzJIFbfVn8zsfg=
 github.com/xtaci/smux v1.5.14/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
 github.com/xtaci/smux v1.5.15 h1:6hMiXswcleXj5oNfcJc+DXS8Vj36XX2LaX98udog6Kc=
 github.com/xtaci/smux v1.5.15/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
+github.com/xtaci/smux v1.5.16 h1:FBPYOkW8ZTjLKUM4LI4xnnuuDC8CQ/dB04HD519WoEk=
+github.com/xtaci/smux v1.5.16/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=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
diff --git a/vendor/github.com/xtaci/smux/.travis.yml b/vendor/github.com/xtaci/smux/.travis.yml
index e1d30fa..0d37d11 100644
--- a/vendor/github.com/xtaci/smux/.travis.yml
+++ b/vendor/github.com/xtaci/smux/.travis.yml
@@ -1,3 +1,6 @@
+arch:
+    - amd64
+    - ppc64le
 language: go
 go:
     - 1.9.x
diff --git a/vendor/github.com/xtaci/smux/session.go b/vendor/github.com/xtaci/smux/session.go
index bc56066..de0c69b 100644
--- a/vendor/github.com/xtaci/smux/session.go
+++ b/vendor/github.com/xtaci/smux/session.go
@@ -24,7 +24,7 @@ var (
 )
 
 type writeRequest struct {
-	prio   uint64
+	prio   uint32
 	frame  Frame
 	result chan writeResult
 }
@@ -496,7 +496,7 @@ func (s *Session) writeFrame(f Frame) (n int, err error) {
 }
 
 // internal writeFrame version to support deadline used in keepalive
-func (s *Session) writeFrameInternal(f Frame, deadline <-chan time.Time, prio uint64) (int, error) {
+func (s *Session) writeFrameInternal(f Frame, deadline <-chan time.Time, prio uint32) (int, error) {
 	req := writeRequest{
 		prio:   prio,
 		frame:  f,
diff --git a/vendor/github.com/xtaci/smux/shaper.go b/vendor/github.com/xtaci/smux/shaper.go
index be03406..c074186 100644
--- a/vendor/github.com/xtaci/smux/shaper.go
+++ b/vendor/github.com/xtaci/smux/shaper.go
@@ -1,9 +1,13 @@
 package smux
 
+func _itimediff(later, earlier uint32) int32 {
+	return (int32)(later - earlier)
+}
+
 type shaperHeap []writeRequest
 
 func (h shaperHeap) Len() int            { return len(h) }
-func (h shaperHeap) Less(i, j int) bool  { return h[i].prio < h[j].prio }
+func (h shaperHeap) Less(i, j int) bool  { return _itimediff(h[j].prio, h[i].prio) > 0 }
 func (h shaperHeap) Swap(i, j int)       { h[i], h[j] = h[j], h[i] }
 func (h *shaperHeap) Push(x interface{}) { *h = append(*h, x.(writeRequest)) }
 
diff --git a/vendor/github.com/xtaci/smux/stream.go b/vendor/github.com/xtaci/smux/stream.go
index 6c9499c..a95fb56 100644
--- a/vendor/github.com/xtaci/smux/stream.go
+++ b/vendor/github.com/xtaci/smux/stream.go
@@ -325,7 +325,7 @@ func (s *Stream) Write(b []byte) (n int, err error) {
 		}
 		frame.data = bts[:sz]
 		bts = bts[sz:]
-		n, err := s.sess.writeFrameInternal(frame, deadline, uint64(s.numWritten))
+		n, err := s.sess.writeFrameInternal(frame, deadline, s.numWritten)
 		s.numWritten++
 		sent += n
 		if err != nil {
@@ -393,7 +393,7 @@ func (s *Stream) writeV2(b []byte) (n int, err error) {
 				}
 				frame.data = bts[:sz]
 				bts = bts[sz:]
-				n, err := s.sess.writeFrameInternal(frame, deadline, uint64(atomic.LoadUint32(&s.numWritten)))
+				n, err := s.sess.writeFrameInternal(frame, deadline, atomic.LoadUint32(&s.numWritten))
 				atomic.AddUint32(&s.numWritten, uint32(sz))
 				sent += n
 				if err != nil {
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 84474e2..95858c5 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -41,7 +41,7 @@ github.com/urfave/cli
 # github.com/xtaci/kcp-go/v5 v5.6.1
 ## explicit
 github.com/xtaci/kcp-go/v5
-# github.com/xtaci/smux v1.5.15
+# github.com/xtaci/smux v1.5.16
 ## explicit
 github.com/xtaci/smux
 # github.com/xtaci/tcpraw v1.2.25