diff --git a/go.mod b/go.mod
index b0f62ef..eed123b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@
 require (
 	github.com/VividCortex/ewma v1.1.1
 	github.com/mattn/go-isatty v0.0.4
-	golang.org/x/crypto v0.0.0-20190129170551-bf88e3f4ba72
-	golang.org/x/sys v0.0.0-20190129075346-302c3dd5f1cc // indirect
+	golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613
+	golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c // indirect
 )
diff --git a/go.sum b/go.sum
index 4296a00..53b6e79 100644
--- a/go.sum
+++ b/go.sum
@@ -2,7 +2,7 @@
 github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
 github.com/mattn/go-isatty v0.0.4 h1:bnP0vzxcAdeI1zdubAl5PjU6zsERjGZb7raWodagDYs=
 github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
-golang.org/x/crypto v0.0.0-20190129170551-bf88e3f4ba72 h1:hOSpsWG5LMauyHIJqtLUU+44acN/ft/9cpzc1ynVDyg=
-golang.org/x/crypto v0.0.0-20190129170551-bf88e3f4ba72/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/sys v0.0.0-20190129075346-302c3dd5f1cc h1:WiYx1rIFmx8c0mXAFtv5D/mHyKe1+jmuP7PViuwqwuQ=
-golang.org/x/sys v0.0.0-20190129075346-302c3dd5f1cc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613 h1:MQ/ZZiDsUapFFiMS+vzwXkCTeEKaum+Do5rINYJDmxc=
+golang.org/x/crypto v0.0.0-20190131182504-b8fe1690c613/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c h1:YeMXU0KQqExdpG959DFhAhfpY8myIsnfqj8lhNFRzzE=
+golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=