diff --git a/buildtools.json b/bindown.json
similarity index 100%
rename from buildtools.json
rename to bindown.json
diff --git a/bindown_test.go b/bindown_test.go
index f0195d5..d19a855 100644
--- a/bindown_test.go
+++ b/bindown_test.go
@@ -14,7 +14,7 @@ func TestLoadConfig(t *testing.T) {
 	t.Run("current format", func(t *testing.T) {
 		dir, teardown := tmpDir(t)
 		defer teardown()
-		file := filepath.Join(dir, "buildtools.json")
+		file := filepath.Join(dir, "bindown.json")
 
 		// language=json
 		content := `
@@ -56,7 +56,7 @@ func TestLoadConfig(t *testing.T) {
 	t.Run("downloaders only", func(t *testing.T) {
 		dir, teardown := tmpDir(t)
 		defer teardown()
-		file := filepath.Join(dir, "buildtools.json")
+		file := filepath.Join(dir, "bindown.json")
 
 		// language=json
 		content := `
diff --git a/cmd/bindown/main.go b/cmd/bindown/main.go
index 10991f7..f5c1232 100644
--- a/cmd/bindown/main.go
+++ b/cmd/bindown/main.go
@@ -7,8 +7,8 @@ import (
 )
 
 var kongVars = kong.Vars{
-	"configfile_help":    `file with tool definitions`,
-	"configfile_default": `buildtools.json`,
+	"configfile_help":    `file with bindown config`,
+	"configfile_default": `bindown.json`,
 	"cellar_dir_help":    `directory where downloads will be cached`,
 	"download_help":      `download a bin`,
 }
diff --git a/downloader.go b/downloader.go
index 1bb51f6..f145cfa 100644
--- a/downloader.go
+++ b/downloader.go
@@ -11,7 +11,7 @@ import (
 	"path"
 	"path/filepath"
 
-	"github.com/mholt/archiver"
+	"github.com/mholt/archiver/v3"
 )
 
 // Downloader downloads a binary
diff --git a/go.mod b/go.mod
index 05e7fcf..2d4ae5e 100644
--- a/go.mod
+++ b/go.mod
@@ -4,13 +4,10 @@ go 1.12
 
 require (
 	github.com/alecthomas/kong v0.2.1
-	github.com/dsnet/compress v0.0.1 // indirect
+	github.com/andybalholm/brotli v1.0.0 // indirect
 	github.com/frankban/quicktest v1.4.2 // indirect
-	github.com/golang/snappy v0.0.1 // indirect
-	github.com/mholt/archiver v3.1.1+incompatible
-	github.com/nwaples/rardecode v1.0.0 // indirect
+	github.com/mholt/archiver/v3 v3.3.0
 	github.com/pierrec/lz4 v2.3.0+incompatible // indirect
 	github.com/stretchr/testify v1.4.0
 	github.com/udhos/equalfile v0.3.0
-	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
 )
diff --git a/go.sum b/go.sum
index 70cdf23..fbaf1f1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,8 @@
 github.com/alecthomas/kong v0.2.1 h1:V1tLBhyQBC4rsbXbcOvm3GBaytJSwRNX69fp1WJxbqQ=
 github.com/alecthomas/kong v0.2.1/go.mod h1:+inYUSluD+p4L8KdviBSgzcqEjUQOfC5fQDRFuc36lI=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/andybalholm/brotli v0.0.0-20190621154722-5f990b63d2d6/go.mod h1:+lx6/Aqd1kLJ1GQfkvOnaZ1WGmLpMpbprPuIOOZX30U=
+github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
+github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -9,22 +11,28 @@ github.com/dsnet/compress v0.0.1/go.mod h1:Aw8dCMJ7RioblQeTqt88akK31OvO8Dhf5Jflh
 github.com/dsnet/golib v0.0.0-20171103203638-1ea166775780/go.mod h1:Lj+Z9rebOhdfkVLjJ8T6VcRQv3SXugXy999NBtR9aFY=
 github.com/frankban/quicktest v1.4.2 h1:eV8n2LQHuA97qKj0t6+7UrHRU0Smz9G+yh87F3Z+3Uk=
 github.com/frankban/quicktest v1.4.2/go.mod h1:36zfPVQyHxymz4cH7wlDmVwDrJuljRB60qkgn7rorfQ=
+github.com/golang/gddo v0.0.0-20190419222130-af0f2af80721/go.mod h1:xEhNfoBDX1hzLm2Nf80qUvZ2sVwoMZ8d6IE2SrsQfh4=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/klauspost/compress v1.4.1/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
+github.com/klauspost/compress v1.9.2 h1:LfVyl+ZlLlLDeQ/d2AqfGIIH4qEDu0Ed2S5GyhCWIWY=
+github.com/klauspost/compress v1.9.2/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
+github.com/klauspost/pgzip v1.2.1 h1:oIPZROsWuPHpOdMVWLuJZXwgjhrW8r1yEX8UqMyeNHM=
+github.com/klauspost/pgzip v1.2.1/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/mholt/archiver v3.1.1+incompatible h1:1dCVxuqs0dJseYEhi5pl7MYPH9zDa1wBi7mF09cbNkU=
-github.com/mholt/archiver v3.1.1+incompatible/go.mod h1:Dh2dOXnSdiLxRiPoVfIr/fI1TwETms9B8CTWfeh7ROU=
+github.com/mholt/archiver/v3 v3.3.0 h1:vWjhY8SQp5yzM9P6OJ/eZEkmi3UAbRrxCq48MxjAzig=
+github.com/mholt/archiver/v3 v3.3.0/go.mod h1:YnQtqsp+94Rwd0D/rk5cnLrxusUBUXg+08Ebtr1Mqao=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/nwaples/rardecode v1.0.0 h1:r7vGuS5akxOnR4JQSkko62RJ1ReCMXxQRPtxsiFMBOs=
 github.com/nwaples/rardecode v1.0.0/go.mod h1:5DzqNKiOdpKKBH87u8VlvAnPZMXcGRhxWkRpHbbfGS0=
+github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pierrec/lz4 v2.3.0+incompatible h1:CZzRn4Ut9GbUkHlQ7jqBXeZQV41ZSKWFc302ZU6lUTk=
 github.com/pierrec/lz4 v2.3.0+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=