diff --git a/go.mod b/go.mod
index 5a34cf543..83c20b0e1 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/agl/ed25519 v0.0.0-20150830182803-278e1ec8e8a6 // indirect
 	github.com/antchfx/xpath v0.0.0-20170728053731-b5c552e1acbd // indirect
 	github.com/antchfx/xquery v0.0.0-20170730121040-eb8c3c172607 // indirect
-	github.com/apparentlymart/go-cidr v0.0.0-20170616213631-2bd8b58cf427
+	github.com/apparentlymart/go-cidr v1.0.0
 	github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3
 	github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e
 	github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da // indirect
diff --git a/go.sum b/go.sum
index 1f2385acf..b12b5a652 100644
--- a/go.sum
+++ b/go.sum
@@ -21,8 +21,8 @@ github.com/antchfx/xpath v0.0.0-20170728053731-b5c552e1acbd h1:S3Fr6QnkpW9VRjiEY
 github.com/antchfx/xpath v0.0.0-20170728053731-b5c552e1acbd/go.mod h1:Yee4kTMuNiPYJ7nSNorELQMr1J33uOpXDMByNYhvtNk=
 github.com/antchfx/xquery v0.0.0-20170730121040-eb8c3c172607 h1:BFFG6KP8ASFBg2ptWsJn8p8RDufBjBDKIxLU7BTYGOM=
 github.com/antchfx/xquery v0.0.0-20170730121040-eb8c3c172607/go.mod h1:LzD22aAzDP8/dyiCKFp31He4m2GPjl0AFyzDtZzUu9M=
-github.com/apparentlymart/go-cidr v0.0.0-20170616213631-2bd8b58cf427 h1:2P/DTyNDU+7qJOB6E5KeIpdc3qcT9IYjyA8hZ9HGz50=
-github.com/apparentlymart/go-cidr v0.0.0-20170616213631-2bd8b58cf427/go.mod h1:EBcsNrHc3zQeuaeCeCtQruQm+n9/YjEn/vI25Lg7Gwc=
+github.com/apparentlymart/go-cidr v1.0.0 h1:lGDvXx8Lv9QHjrAVP7jyzleG4F9+FkRhJcEsDFxeb8w=
+github.com/apparentlymart/go-cidr v1.0.0/go.mod h1:EBcsNrHc3zQeuaeCeCtQruQm+n9/YjEn/vI25Lg7Gwc=
 github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3 h1:ZSTrOEhiM5J5RFxEaFvMZVEAM1KvT1YzbEOwB2EAGjA=
 github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3/go.mod h1:oL81AME2rN47vu18xqj1S1jPIPuN7afo62yKTNn3XMM=
 github.com/apparentlymart/go-textseg v1.0.0 h1:rRmlIsPEEhUTIKQb7T++Nz/A5Q6C9IuX2wFoYVvnCs0=
diff --git a/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go b/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go
index 753447320..c292db0ce 100644
--- a/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go
+++ b/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go
@@ -71,12 +71,12 @@ func Host(base *net.IPNet, num int) (net.IP, error) {
 	if numUint64 > maxHostNum {
 		return nil, fmt.Errorf("prefix of %d does not accommodate a host numbered %d", parentLen, num)
 	}
-        var bitlength int
-        if ip.To4() != nil {
-              bitlength = 32
-        } else {
-              bitlength = 128
-        }
+	var bitlength int
+	if ip.To4() != nil {
+		bitlength = 32
+	} else {
+		bitlength = 128
+	}
 	return insertNumIntoIP(ip, num, bitlength), nil
 }
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 2015f07a3..751b7486d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -50,7 +50,7 @@ github.com/agl/ed25519/edwards25519
 github.com/antchfx/xpath
 # github.com/antchfx/xquery v0.0.0-20170730121040-eb8c3c172607
 github.com/antchfx/xquery/xml
-# github.com/apparentlymart/go-cidr v0.0.0-20170616213631-2bd8b58cf427
+# github.com/apparentlymart/go-cidr v1.0.0
 github.com/apparentlymart/go-cidr/cidr
 # github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3
 github.com/apparentlymart/go-dump/dump