diff --git a/.gitignore b/.gitignore
index 3b09fc2d3..a02904461 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ gopm
 *.exe~
 repos/
 vendor/
+.vendor/
diff --git a/cmd/update.go b/cmd/update.go
new file mode 100644
index 000000000..646f5ad79
--- /dev/null
+++ b/cmd/update.go
@@ -0,0 +1,195 @@
+// Copyright 2013 gopm authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/Unknwon/com"
+	"github.com/codegangsta/cli"
+
+	"github.com/gpmgo/gopm/doc"
+	"github.com/gpmgo/gopm/log"
+)
+
+var CmdUpdate = cli.Command{
+	Name:  "update",
+	Usage: "update self",
+	Description: `Command bin downloads and links dependencies according to gopmfile,
+and build executable binary to work directory
+
+gopm update
+
+Can only specify one each time, and only works for projects that 
+contains main package`,
+	Action: runUpdate,
+}
+
+func exePath() string {
+	file, _ := exec.LookPath(os.Args[0])
+	path, _ := filepath.Abs(file)
+	return path
+}
+
+func runUpdate(ctx *cli.Context) {
+	doc.LoadPkgNameList(doc.HomeDir + "/data/pkgname.list")
+
+	installRepoPath = doc.HomeDir + "/repos"
+
+	// Check arguments.
+	num := 0
+
+	if len(ctx.Args()) != num {
+		log.Error("Update", "Fail to start command")
+		log.Fatal("", "Invalid argument number")
+	}
+
+	// Parse package version.
+	info := "github.com/gpmgo/gopm"
+	pkgPath := info
+	ver := ""
+	var err error
+	if i := strings.Index(info, "@"); i > -1 {
+		pkgPath = info[:i]
+		_, ver, err = validPath(info[i+1:])
+		if err != nil {
+			log.Error("Update", "Fail to parse version")
+			log.Fatal("", err.Error())
+		}
+	}
+
+	// Check package name.
+	if !strings.Contains(pkgPath, "/") {
+		name, ok := doc.PackageNameList[pkgPath]
+		if !ok {
+			log.Error("Update", "Invalid package name: "+pkgPath)
+			log.Fatal("", "No match in the package name list")
+		}
+		pkgPath = name
+	}
+
+	// Get code.
+	stdout, _, _ := com.ExecCmd("gopm", "get", info)
+	if len(stdout) > 0 {
+		fmt.Print(stdout)
+	}
+
+	// Check if previous steps were successful.
+	repoPath := installRepoPath + "/" + pkgPath
+	if len(ver) > 0 {
+		repoPath += "." + ver
+	}
+	if !com.IsDir(repoPath) {
+		log.Error("Bin", "Fail to continue command")
+		log.Fatal("", "Previous steps weren't successful")
+	}
+
+	wd, err := os.Getwd()
+	if err != nil {
+		log.Error("Bin", "Fail to get work directory")
+		log.Fatal("", err.Error())
+	}
+
+	// Change to repository path.
+	log.Log("Changing work directory to %s", repoPath)
+	err = os.Chdir(repoPath)
+	if err != nil {
+		log.Error("Bin", "Fail to change work directory")
+		log.Fatal("", err.Error())
+	}
+
+	// Build application.
+	stdout, _, _ = com.ExecCmd("gopm", "build")
+	if len(stdout) > 0 {
+		fmt.Print(stdout)
+	}
+	defer func() {
+		// Clean files.
+		os.RemoveAll(path.Join(repoPath, VENDOR))
+	}()
+
+	// Check if previous steps were successful.
+	if com.IsFile(doc.GopmFileName) {
+		log.Trace("Loading gopmfile...")
+		gf := doc.NewGopmfile(".")
+
+		var err error
+		pkgName, err = gf.GetValue("target", "path")
+		if err == nil {
+			log.Log("Target name: %s", pkgName)
+		}
+	}
+
+	if len(pkgName) == 0 {
+		_, pkgName = filepath.Split(pkgPath)
+	}
+
+	binName := path.Base(pkgName)
+	if runtime.GOOS == "windows" {
+		binName += ".exe"
+	}
+	binPath := path.Join(VENDOR, "src", pkgPath, binName)
+	if !com.IsFile(binPath) {
+		log.Error("Update", "Fail to continue command")
+		log.Fatal("", "Previous steps weren't successful or the project does not contain main package")
+	}
+
+	movePath := exePath()
+	fmt.Print(movePath)
+
+	// Move binary to given directory.
+	if runtime.GOOS != "windows" {
+		err = os.Rename(binPath, movePath)
+		if err != nil {
+			log.Error("Update", "Fail to move binary")
+			log.Fatal("", err.Error())
+		}
+		os.Chmod(movePath+"/"+binName, os.ModePerm)
+	} else {
+		batPath := filepath.Join(wd, "a.bat")
+		f, err := os.Create(batPath)
+		if err != nil {
+			log.Error("Update", "Fail to generate bat file")
+			log.Fatal("", err.Error())
+		}
+		f.WriteString(fmt.Sprintf(`ping -n 1 127.0.0.1>nul\ncopy "%v" "%v"\ndel "%v"`,
+			binPath, movePath, binPath))
+		f.Close()
+
+		attr := &os.ProcAttr{
+			Dir: wd,
+			Env: os.Environ(),
+			//Files: []*os.File{nil, nil, nil},
+			Files: []*os.File{os.Stdin, os.Stdout, os.Stderr},
+		}
+
+		_, err = os.StartProcess(batPath, []string{"a.bat"}, attr)
+		if err != nil {
+			log.Error("Update", "Fail to start bat process")
+			log.Fatal("", err.Error())
+		}
+	}
+
+	log.Log("Changing work directory back to %s", wd)
+	os.Chdir(wd)
+
+	log.Success("SUCC", "Update", "Command execute successfully!")
+}
diff --git a/gopm.go b/gopm.go
index d5520bad2..a89bccbc5 100644
--- a/gopm.go
+++ b/gopm.go
@@ -58,6 +58,7 @@ func main() {
 		cmd.CmdRun,
 		cmd.CmdBuild,
 		cmd.CmdInstall,
+		//cmd.CmdUpdate,
 		//cmd.CmdTest,
 	}
 	app.Run(os.Args)