diff --git a/LICENSE copy b/LICENSE copy
new file mode 100644
index 0000000..ab60297
--- /dev/null
+++ b/LICENSE copy	
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Readme.md b/Readme.md
index 6822dad..b57ab18 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,6 +2,9 @@
 > 本模块是对原生的`crypto`模块二次封装的，在使用上更加简单方便。
 
 ## 更新日志
++ v3.3.4
+  - 添加MIT开源协议
+
 + v3.3.3
   - 优化`.d.ts`参数声明
 
diff --git a/package.json b/package.json
index a63feca..298adda 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "crypto.js",
   "type": "module",
-  "version": "3.3.3",
+  "version": "3.3.4",
   "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",
@@ -19,6 +19,7 @@
     "type": "git",
     "url": "https://git.wkit.fun/bytedo/crypto.js.git"
   },
+  "license": "MIT",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "files": [