diff --git a/go.mod b/go.mod
index c0e1e5f24..c146b20ab 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/google/gopacket v1.1.17 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/urfave/cli v1.21.0
-	github.com/xtaci/kcp-go/v5 v5.5.16
+	github.com/xtaci/kcp-go/v5 v5.5.17
 	github.com/xtaci/smux v1.5.14
 	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 6ba252d88..6bc264365 100644
--- a/go.sum
+++ b/go.sum
@@ -24,8 +24,8 @@ github.com/tjfoc/gmsm v1.3.2 h1:7JVkAn5bvUJ7HtU08iW6UiD+UTmJTIToHCfeFzkcCxM=
 github.com/tjfoc/gmsm v1.3.2/go.mod h1:HaUcFuY0auTiaHB9MHFGCPx5IaLhTUd2atbCFBQXn9w=
 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 v5.5.16 h1:doQfgOdghnuqnOxsr1fR5kWTxV/X15bUKQXMc11uiOU=
-github.com/xtaci/kcp-go/v5 v5.5.16/go.mod h1:pVx3jb4LT5edTmPayc77tIU9nRsjGck8wep5ZV/RBO0=
+github.com/xtaci/kcp-go/v5 v5.5.17 h1:bkdaqtER0PMlP05BBHfu6W+71kt/NwbAk93KH7F78Ck=
+github.com/xtaci/kcp-go/v5 v5.5.17/go.mod h1:pVx3jb4LT5edTmPayc77tIU9nRsjGck8wep5ZV/RBO0=
 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 v1.5.14 h1:1j+zJYDZRv9FHaWqCJfH5RPizIm0fSzJIFbfVn8zsfg=
diff --git a/vendor/github.com/xtaci/kcp-go/v5/sess.go b/vendor/github.com/xtaci/kcp-go/v5/sess.go
index cd02163c9..e5ada2bca 100644
--- a/vendor/github.com/xtaci/kcp-go/v5/sess.go
+++ b/vendor/github.com/xtaci/kcp-go/v5/sess.go
@@ -858,11 +858,11 @@ func (l *Listener) notifyReadError(err error) {
 		close(l.chSocketReadError)
 
 		// propagate read error to all sessions
-		l.sessionLock.Lock()
+		l.sessionLock.RLock()
 		for _, s := range l.sessions {
 			s.notifyReadError(err)
 		}
-		l.sessionLock.Unlock()
+		l.sessionLock.RUnlock()
 	})
 }
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 485dce597..038607c7b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -38,7 +38,7 @@ github.com/tjfoc/gmsm/sm4
 # github.com/urfave/cli v1.21.0
 ## explicit
 github.com/urfave/cli
-# github.com/xtaci/kcp-go/v5 v5.5.16
+# github.com/xtaci/kcp-go/v5 v5.5.17
 ## explicit
 github.com/xtaci/kcp-go/v5
 # github.com/xtaci/smux v1.5.14