diff --git a/wallet/txsizes/go.mod b/wallet/txsizes/go.mod
index 1a2893bbf5..e0ba6f5e5d 100644
--- a/wallet/txsizes/go.mod
+++ b/wallet/txsizes/go.mod
@@ -10,7 +10,7 @@ require (
 	golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67 // indirect
 	golang.org/x/net v0.0.0-20190206173232-65e2d4e15006 // indirect
 	golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 // indirect
-	golang.org/x/sys v0.0.0-20190904154756-749cb33beabd // indirect
+	golang.org/x/sys v0.1.0 // indirect
 	golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/yaml.v2 v2.2.2 // indirect
diff --git a/wallet/txsizes/go.sum b/wallet/txsizes/go.sum
index 08cf615f27..050767e055 100644
--- a/wallet/txsizes/go.sum
+++ b/wallet/txsizes/go.sum
@@ -48,8 +48,8 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190904154756-749cb33beabd h1:DBH9mDw0zluJT/R+nGuV3jWFWLFaHyYZWD4tOT+cjn0=
-golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/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=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 h1:z99zHgr7hKfrUcX/KsoJk5FJfjTceCKIp96+biqP4To=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=