diff --git a/encoding.go b/encoding.go
index a44f3c5..4e69a92 100644
--- a/encoding.go
+++ b/encoding.go
@@ -3,6 +3,7 @@ package goutil
 import (
 	"encoding/json"
 	"encoding/xml"
+	"unicode"
 )
 
 // EncodeJSON encode anything to json string