diff --git a/gost.go b/gost.go
index 02dd7f49..1894b848 100644
--- a/gost.go
+++ b/gost.go
@@ -20,7 +20,7 @@ import (
 )
 
 // Version is the gost version.
-const Version = "2.11.0"
+const Version = "2.11.1"
 
 // Debug is a flag that enables the debug log.
 var Debug bool
diff --git a/snapcraft.yaml b/snapcraft.yaml
index 3384f2e9..f58b4e6f 100644
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@@ -1,6 +1,6 @@
 name: gost
 type: app
-version: '2.11.0'
+version: '2.11.1'
 title: GO Simple Tunnel
 summary: A simple security tunnel written in golang
 description: |
diff --git a/ssh.go b/ssh.go
index e4b1ab65..f772503a 100644
--- a/ssh.go
+++ b/ssh.go
@@ -31,6 +31,7 @@ var (
 	errSessionDead = errors.New("session is dead")
 )
 
+// ParseSSHKeyFile parses ssh key file.
 func ParseSSHKeyFile(fp string) (ssh.Signer, error) {
 	key, err := ioutil.ReadFile(fp)
 	if err != nil {
@@ -39,6 +40,7 @@ func ParseSSHKeyFile(fp string) (ssh.Signer, error) {
 	return ssh.ParsePrivateKey(key)
 }
 
+// ParseSSHAuthorizedKeysFile parses ssh Authorized Keys file.
 func ParseSSHAuthorizedKeysFile(fp string) (map[string]bool, error) {
 	authorizedKeysBytes, err := ioutil.ReadFile(fp)
 	if err != nil {