diff --git a/component/method.go b/component/method.go
index 420a633..f8792ff 100644
--- a/component/method.go
+++ b/component/method.go
@@ -1,15 +1,16 @@
 package component
 
 import (
+	"git.noahlan.cn/northlan/ngs/session"
 	"reflect"
 	"unicode"
 	"unicode/utf8"
 )
 
 var (
-	typeOfError = reflect.TypeOf((*error)(nil)).Elem()
-	typeOfBytes = reflect.TypeOf(([]byte)(nil))
-	//typeOfSession = reflect.TypeOf(session.New(nil))
+	typeOfError   = reflect.TypeOf((*error)(nil)).Elem()
+	typeOfBytes   = reflect.TypeOf(([]byte)(nil))
+	typeOfSession = reflect.TypeOf(session.New(nil))
 )
 
 func isExported(name string) bool {
diff --git a/interface.go b/interface.go
index abc7538..cac704d 100644
--- a/interface.go
+++ b/interface.go
@@ -19,9 +19,6 @@ import (
 
 var running int32
 
-// VERSION returns current ngs version
-var VERSION = "0.1.0"
-
 var (
 	// app represents the current server process
 	app = &struct {
diff --git a/internal/log/logger.go b/internal/log/logger.go
index a868daa..2e0b2cd 100644
--- a/internal/log/logger.go
+++ b/internal/log/logger.go
@@ -13,7 +13,7 @@ type Logger interface {
 }
 
 func init() {
-	SetLogger(log.New(os.Stderr, "[NGServer]", log.LstdFlags|log.Lshortfile))
+	SetLogger(log.New(os.Stderr, "[NGServer] ", log.LstdFlags|log.Lshortfile))
 }
 
 var (
diff --git a/version.go b/version.go
new file mode 100644
index 0000000..b3ff863
--- /dev/null
+++ b/version.go
@@ -0,0 +1,4 @@
+package ngs
+
+// VERSION returns current ngs version
+const VERSION = "0.1.1"