diff --git a/index.js b/index.js
index 77cfdf8..eae5e82 100644
--- a/index.js
+++ b/index.js
@@ -4,8 +4,7 @@
  * @date 2020/09/16 17:23:52
  */
 
-import crypto from 'crypto.js'
-import { base64encode, base64decode, sha1 } from 'crypto.js'
+import { base64encode, base64decode, hmac, sha1 } from 'crypto.js'
 
 const HS256_HEADER = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9'
 const DEFAULT_CONFIG = {
@@ -14,8 +13,8 @@ const DEFAULT_CONFIG = {
   secret: 'it_is_secret_key' // jwt密钥, 使用时请修改
 }
 
-function hmac(str, secret) {
-  let buf = crypto.hmac('sha256', str, secret, 'buffer')
+function hmac_base64(str, secret) {
+  let buf = hmac('sha256', str, secret, 'buffer')
   return base64encode(buf, true)
 }
 
@@ -44,7 +43,7 @@ export const JwtModule = {
         let token = ''
 
         payload = base64encode(JSON.stringify(payload), true)
-        token = hmac(`${HS256_HEADER}.${payload}`, secret)
+        token = hmac_base64(`${HS256_HEADER}.${payload}`, secret)
 
         return `${HS256_HEADER}.${payload}.${token}`
       },
@@ -65,7 +64,7 @@ export const JwtModule = {
           return false
         }
 
-        if (hmac(jwt.join('.'), secret) === auth) {
+        if (hmac_base64(jwt.join('.'), secret) === auth) {
           return payload.data
         }
 
diff --git a/package.json b/package.json
index 6cd3465..f941084 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gm5/jwt",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "type": "module",
   "description": "json web token",
   "main": "index.js",
@@ -15,6 +15,6 @@
   "repository": "https://git.wkit.fun/gm5/jwt.git",
   "license": "MIT",
   "dependencies": {
-    "crypto.js": "^2.0.1"
+    "crypto.js": "^3.1.2"
   }
 }