diff --git a/go.mod b/go.mod
index 2804557..9e03f63 100644
--- a/go.mod
+++ b/go.mod
@@ -3,10 +3,11 @@ module golang.zx2c4.com/wireguard
 go 1.12
 
 require (
-	github.com/Microsoft/go-winio v0.0.0-20190429060359-b01600290cd4
-	golang.org/x/crypto v0.0.0-20190411191339-88737f569e3a
-	golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3
-	golang.org/x/sys v0.0.0-20190412213103-97732733099d
+	github.com/Microsoft/go-winio v0.4.12
+	github.com/pkg/errors v0.8.1 // indirect
+	golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734
+	golang.org/x/net v0.0.0-20190502183928-7f726cade0ab
+	golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82
 )
 
 replace github.com/Microsoft/go-winio => golang.zx2c4.com/wireguard/windows v0.0.0-20190429060359-b01600290cd4
diff --git a/go.sum b/go.sum
index a82ab0f..ec2f4a7 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,15 @@
-github.com/Microsoft/go-winio v0.4.12 h1:xAfWHN1IrQ0NJ9TBC0KBZoqLjzDTr1ML+4MywiUOryc=
-github.com/Microsoft/go-winio v0.4.12/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20190411191339-88737f569e3a h1:Igim7XhdOpBnWPuYJ70XcNpq8q3BCACtVgNfoJxOV7g=
-golang.org/x/crypto v0.0.0-20190411191339-88737f569e3a/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
+golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734 h1:p/H982KKEjUnLJkM3tt/LemDnOc1GiZL5FCVlORJ5zo=
+golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190502183928-7f726cade0ab h1:9RfW3ktsOZxgo9YNbBAjq1FWzc/igwEcUzZz8IXgSbk=
+golang.org/x/net v0.0.0-20190502183928-7f726cade0ab/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82 h1:vsphBvatvfbhlb4PO1BYSr9dzugGxJ/SQHoNufZJq1w=
+golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.zx2c4.com/wireguard/windows v0.0.0-20190429060359-b01600290cd4 h1:wueYNew2pMLl/LcKqX4PAzc+zV4suK9+DJaZ8yIEHkM=
 golang.zx2c4.com/wireguard/windows v0.0.0-20190429060359-b01600290cd4/go.mod h1:Y+FYqVFaQO6a+1uigm0N0GiuaZrLEaBxEiJ8tfH9sMQ=