diff --git a/.gitignore b/.gitignore
index 640e407..452f349 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 gotty
 bindata
+builds
diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index c2bab58..d445a4e 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -1,6 +1,6 @@
 {
 	"ImportPath": "github.com/yudai/gotty",
-	"GoVersion": "go1.5",
+	"GoVersion": "go1.5.1",
 	"Deps": [
 		{
 			"ImportPath": "github.com/braintree/manners",
diff --git a/Makefile b/Makefile
index 1017abd..0b91ed1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+OUTPUT_DIR = ./builds
+
 gotty: app/resource.go main.go app/*.go
 	go build
 
@@ -28,3 +30,24 @@ bindata/static/js/hterm.js: bindata/static/js libapps/hterm/js/*.js
 
 bindata/static/js/gotty.js: bindata/static/js resources/gotty.js
 	cp resources/gotty.js bindata/static/js/gotty.js
+
+tools:
+	go get github.com/tools/godep
+	go get github.com/mitchellh/gox
+	go get github.com/tcnksm/ghr
+
+deps:
+	godep restore
+
+test:
+	if [ `go fmt ./... | wc -l` -gt 0 ]; then echo "go fmt error"; exit 1; fi
+
+cross_compile:
+	GOARM=5 gox -os="darwin linux freebsd netbsd openbsd" -arch="386 amd64 arm" -output "${OUTPUT_DIR}/pkg/{{.OS}}_{{.Arch}}/{{.Dir}}"
+
+targz:
+	mkdir -p ${OUTPUT_DIR}/dist
+	cd ${OUTPUT_DIR}/pkg/; for osarch in *; do (cd $$osarch; tar zcvf ../../dist/gotty_$$osarch.tar.gz ./*); done;
+
+release:
+	ghr --delete --prerelease -u yudai -r gotty pre-release ${OUTPUT_DIR}/dist
diff --git a/wercker.yml b/wercker.yml
index c706c97..3332e1d 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -1,27 +1,32 @@
-box: tcnksm/gox
+box: golang:1.5.1
 
 build:
   steps:
     - setup-go-workspace
     - script:
-        name: go get
-        code: |
-          go get github.com/tools/godep
-          godep restore
+        name: tools
+        code: make tools
     - script:
-        name: check format
-        code: |
-          if [ `go fmt ./... | wc -l` -gt 0 ]; then echo "go fmt error"; exit 1; fi
-    - tcnksm/gox:
-        os: "darwin linux freebsd netbsd openbsd"
-        arch: "386 amd64 arm"
-    - yudai/targz:
-        input: $WERCKER_OUTPUT_DIR/pkg
-        output: $WERCKER_OUTPUT_DIR/dist
+        name: deps
+        code: make deps
+    - script:
+        name: test
+        code: make test
+    - script:
+        name: cross compile
+        code: make cross_compile OUTPUT_DIR=$WERCKER_OUTPUT_DIR
+    - script:
+        name: targz
+        code: make targz OUTPUT_DIR=$WERCKER_OUTPUT_DIR
+    - script:
+        name: store Makefile
+        code: cp Makefile $WERCKER_OUTPUT_DIR/
 
 deploy:
   steps:
-    - tcnksm/ghr:
-        token: $GITHUB_TOKEN
-        input: dist
-        replace: true
+    - script:
+        name: tools
+        code: make tools
+    - script:
+        name: release
+        code: make release OUTPUT_DIR=.