diff --git a/go.mod b/go.mod
index 1fb94e9f..1c979b30 100644
--- a/go.mod
+++ b/go.mod
@@ -23,7 +23,7 @@ require (
 	go.dedis.ch/protobuf v1.0.11
 	go.etcd.io/bbolt v1.3.4
 	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
-	golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5
+	golang.org/x/sys v0.1.0
 	golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	rsc.io/goversion v1.2.0
diff --git a/go.sum b/go.sum
index 2ba3aba6..3886ebd8 100644
--- a/go.sum
+++ b/go.sum
@@ -89,8 +89,9 @@ golang.org/x/net v0.0.0-20200301022130-244492dfa37a h1:GuSPYbZzB5/dcLNCwLQLsg3ob
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sys v0.0.0-20190124100055-b90733256f2e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5 h1:LfCXLvNmTYH9kEmVgqbnsWfruoXZIrh4YBgqVHtDvw0=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/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 v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=