diff --git a/Readme.md b/Readme.md
index 10862ee..872a335 100644
--- a/Readme.md
+++ b/Readme.md
@@ -117,9 +117,10 @@ crypto.base64encode('hello world') //aGVsbG8gd29ybGQ=
 
 
 
-### base64decode(str[, urlFriendly])
+### base64decode(str[, urlFriendly][, outEncode])
 - str `<String>`
 - urlFriendly `<Boolean>` 可选
+- outEncode `<String>` 可选，默认ascii, 如果之前的编码的字符串带有中文等字符,请设置为utf8等
 
 > 与之对应的，便是这个base解码了。同样`urlFriendly`是指要解码的字符串之前是否采用了URL友好处理，默认否。
 
diff --git a/index.js b/index.js
index 1ca1f94..0c25d8f 100644
--- a/index.js
+++ b/index.js
@@ -188,13 +188,11 @@ module.exports = {
     }
     let encode = str.toString('base64')
     if (urlFriendly) {
-      encode = encode
-        .replace(/[+\/]/g, m => {
-          return m === '+' ? '-' : '_'
-        })
+      return encode
+        .replace(/\+/g, '-')
+        .replace(/\//g, '_')
         .replace(/=/g, '')
     }
-
     return encode
   },
 
@@ -207,9 +205,8 @@ module.exports = {
   base64decode(str, urlFriendly, encoding) {
     if (urlFriendly) {
       str = str
-        .replace(/[-_]/g, m => {
-          return m === '-' ? '+' : '/'
-        })
+        .replace(/-/g, '+')
+        .replace(/_/g, '/')
         .replace(/[^A-Za-z0-9\+\/]/g, '')
     }
 
diff --git a/package.json b/package.json
index 4385e16..b82830d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "crypto.js",
-  "version": "1.1.3",
+  "version": "1.1.4",
   "description": "原生crypto加密模块的二次封装,简化常用加密函数的使用",
   "keywords": [
     "md5",