diff --git a/History.md b/History.md
index fbabb06..7ec99ef 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,9 @@
 
+1.4.2 / 2015-09-20
+==================
+
+ * refact(es6): use es6 syntax.
+
 1.4.1 / 2015-09-18
 ==================
 
diff --git a/package.json b/package.json
index 3bc97f6..fc3ead6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "koa-locales",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "koa locales, i18n solution for koa",
   "main": "index.js",
   "files": [