diff --git a/go.mod b/go.mod
index 23eab8a..85620f3 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,6 @@
 
 require (
 	github.com/VividCortex/ewma v1.1.1
-	golang.org/x/crypto v0.0.0-20190222235706-ffb98f73852f
-	golang.org/x/sys v0.0.0-20190222171317-cd391775e71e // indirect
+	golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b
+	golang.org/x/sys v0.0.0-20190225065934-cc5685c2db12 // indirect
 )
diff --git a/go.sum b/go.sum
index 6706347..2a4ac41 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,6 @@
 github.com/VividCortex/ewma v1.1.1 h1:MnEK4VOv6n0RSY4vtRe3h11qjxL3+t0B8yOL8iMXdcM=
 github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
-golang.org/x/crypto v0.0.0-20190222235706-ffb98f73852f h1:qWFY9ZxP3tfI37wYIs/MnIAqK0vlXp1xnYEa5HxFSSY=
-golang.org/x/crypto v0.0.0-20190222235706-ffb98f73852f/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/sys v0.0.0-20190222171317-cd391775e71e h1:oF7qaQxUH6KzFdKN4ww7NpPdo53SZi4UlcksLrb2y/o=
-golang.org/x/sys v0.0.0-20190222171317-cd391775e71e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b h1:+/WWzjwW6gidDJnMKWLKLX1gxn7irUTF1fLpQovfQ5M=
+golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20190225065934-cc5685c2db12 h1:Zw7eRv6INHGfu15LVRN1vrrwusJbnfJjAZn3D1VkQIE=
+golang.org/x/sys v0.0.0-20190225065934-cc5685c2db12/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=