diff --git a/dest/index.js b/dest/index.js
index 888488a..d4cf99a 100644
--- a/dest/index.js
+++ b/dest/index.js
@@ -71,7 +71,7 @@ var LOCALE_ZH_CN = {
   yy: '%s年'
 };
 // 当前本地化语言对象
-var _curentLocale = {};
+var _curentLocale = undefined;
 
 /**
  * 修改本地化语言
@@ -85,14 +85,15 @@ function locate(arg) {
   } else {
     newLocale = arg;
   }
+  if (!_curentLocale) {
+    _curentLocale = {};
+  }
   for (prop in newLocale) {
     if (newLocale.hasOwnProperty(prop) && typeof newLocale[prop] === 'string') {
       _curentLocale[prop] = newLocale[prop];
     }
   }
 }
-// 初始化本地化语言为 en
-locate('');
 
 /**
  * CONST for .fromNow
@@ -112,6 +113,10 @@ var DET_STD = [['yy', 31536e6], // 1000 * 60 * 60 * 24 * 365 一年月按 365 
  */
 // 只要大于等于 0 都是秒
 function fromNow(datetime) {
+  if (!_curentLocale) {
+    // 初始化本地化语言为 en
+    locate('');
+  }
   var det = +new Date() - +getDateObject(datetime);
   var format = undefined,
       str = undefined,
diff --git a/dest/index.umd.js b/dest/index.umd.js
index c4b4732..d644c2d 100644
--- a/dest/index.umd.js
+++ b/dest/index.umd.js
@@ -75,7 +75,7 @@
     yy: '%s年'
   };
   // 当前本地化语言对象
-  var _curentLocale = {};
+  var _curentLocale = undefined;
 
   /**
    * 修改本地化语言
@@ -89,14 +89,15 @@
     } else {
       newLocale = arg;
     }
+    if (!_curentLocale) {
+      _curentLocale = {};
+    }
     for (prop in newLocale) {
       if (newLocale.hasOwnProperty(prop) && typeof newLocale[prop] === 'string') {
         _curentLocale[prop] = newLocale[prop];
       }
     }
   }
-  // 初始化本地化语言为 en
-  locate('');
 
   /**
    * CONST for .fromNow
@@ -116,6 +117,10 @@
    */
   // 只要大于等于 0 都是秒
   function fromNow(datetime) {
+    if (!_curentLocale) {
+      // 初始化本地化语言为 en
+      locate('');
+    }
     var det = +new Date() - +getDateObject(datetime);
     var format = undefined,
         str = undefined,
diff --git a/package.json b/package.json
index 957fec7..371aff9 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,11 @@
 {
   "name": "silly-datetime",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "simple datetime formater",
   "main": "dest/index.js",
   "jsnext:main": "src/index.js",
   "scripts": {
+    "prepublish": "node rollup.js",
     "test": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage"
   },
   "repository": {
diff --git a/src/index.js b/src/index.js
index 60b8efa..4dc20aa 100644
--- a/src/index.js
+++ b/src/index.js
@@ -74,7 +74,7 @@ const LOCALE_ZH_CN = {
   yy: '%s年'
 };
 // 当前本地化语言对象
-let _curentLocale = {};
+let _curentLocale;
 
 
 /**
@@ -88,14 +88,15 @@ export function locate(arg) {
   } else {
     newLocale = arg;
   }
+  if (!_curentLocale) {
+    _curentLocale = {};
+  }
   for (prop in newLocale) {
     if (newLocale.hasOwnProperty(prop) && typeof newLocale[prop] === 'string') {
       _curentLocale[prop] = newLocale[prop];
     }
   }
 }
-// 初始化本地化语言为 en
-locate('');
 
 
 /**
@@ -117,6 +118,10 @@ const DET_STD = [
  * @return {string}          时间距离
  */
 export function fromNow(datetime) {
+  if (!_curentLocale) {
+    // 初始化本地化语言为 en
+    locate('');
+  }
   let det = +new Date() - (+getDateObject(datetime));
   let format, str, i = 0, detDef, detDefVal;
   if (det < 0) {