diff --git a/vendor/github.com/appleboy/easyssh-proxy/easyssh.go b/vendor/github.com/appleboy/easyssh-proxy/easyssh.go
index 80be120..de50948 100644
--- a/vendor/github.com/appleboy/easyssh-proxy/easyssh.go
+++ b/vendor/github.com/appleboy/easyssh-proxy/easyssh.go
@@ -67,7 +67,12 @@ func getKeyFile(keypath string) (ssh.Signer, error) {
 	return pubkey, nil
 }
 
-func getSSHConfig(config DefaultConfig) *ssh.ClientConfig {
+// returns *ssh.ClientConfig and io.Closer.
+// if io.Closer is not nil, io.Closer.Close() should be called when
+// *ssh.ClientConfig is no longer used.
+func getSSHConfig(config DefaultConfig) (*ssh.ClientConfig, io.Closer) {
+	var sshAgent io.Closer
+
 	// auths holds the detected ssh auth methods
 	auths := []ssh.AuthMethod{}
 
@@ -93,7 +98,6 @@ func getSSHConfig(config DefaultConfig) *ssh.ClientConfig {
 
 	if sshAgent, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK")); err == nil {
 		auths = append(auths, ssh.PublicKeysCallback(agent.NewClient(sshAgent).Signers))
-		defer sshAgent.Close()
 	}
 
 	return &ssh.ClientConfig{
@@ -101,7 +105,7 @@ func getSSHConfig(config DefaultConfig) *ssh.ClientConfig {
 		User:            config.User,
 		Auth:            auths,
 		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
-	}
+	}, sshAgent
 }
 
 // Connect to remote server using MakeConfig struct and returns *ssh.Session
@@ -109,23 +113,29 @@ func (ssh_conf *MakeConfig) Connect() (*ssh.Session, error) {
 	var client *ssh.Client
 	var err error
 
-	targetConfig := getSSHConfig(DefaultConfig{
+	targetConfig, closer := getSSHConfig(DefaultConfig{
 		User:     ssh_conf.User,
 		Key:      ssh_conf.Key,
 		KeyPath:  ssh_conf.KeyPath,
 		Password: ssh_conf.Password,
 		Timeout:  ssh_conf.Timeout,
 	})
+	if closer != nil {
+		defer closer.Close()
+	}
 
 	// Enable proxy command
 	if ssh_conf.Proxy.Server != "" {
-		proxyConfig := getSSHConfig(DefaultConfig{
+		proxyConfig, closer := getSSHConfig(DefaultConfig{
 			User:     ssh_conf.Proxy.User,
 			Key:      ssh_conf.Proxy.Key,
 			KeyPath:  ssh_conf.Proxy.KeyPath,
 			Password: ssh_conf.Proxy.Password,
 			Timeout:  ssh_conf.Proxy.Timeout,
 		})
+		if closer != nil {
+			defer closer.Close()
+		}
 
 		proxyClient, err := ssh.Dial("tcp", net.JoinHostPort(ssh_conf.Proxy.Server, ssh_conf.Proxy.Port), proxyConfig)
 		if err != nil {