diff --git a/golang/tcpconn/go.mod b/golang/tcpconn/go.mod
index 9eeb8b2..9840354 100644
--- a/golang/tcpconn/go.mod
+++ b/golang/tcpconn/go.mod
@@ -4,5 +4,5 @@ go 1.14
 
 require (
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
+	golang.org/x/sys v0.1.0
 )
diff --git a/golang/tcpconn/go.sum b/golang/tcpconn/go.sum
index 47092ab..1cf5ce1 100644
--- a/golang/tcpconn/go.sum
+++ b/golang/tcpconn/go.sum
@@ -1,4 +1,4 @@
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=