diff --git a/go.mod b/go.mod
index ba6b33f..547b2dc 100644
--- a/go.mod
+++ b/go.mod
@@ -3,5 +3,5 @@
 require (
 	github.com/VividCortex/ewma v1.1.1
 	golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67
-	golang.org/x/sys v0.0.0-20190213121743-983097b1a8a3 // indirect
+	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a // indirect
 )
diff --git a/go.sum b/go.sum
index 0c95f03..015a109 100644
--- a/go.sum
+++ b/go.sum
@@ -2,5 +2,5 @@
 github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67 h1:ng3VDlRp5/DHpSWl02R4rM9I+8M2rhmsuLwAMmkLQWE=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/sys v0.0.0-20190213121743-983097b1a8a3 h1:+KlxhGbYkFs8lMfwKn+2ojry1ID5eBSMXprS2u/wqCE=
-golang.org/x/sys v0.0.0-20190213121743-983097b1a8a3/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=