diff --git a/pack.config.js b/pack.config.js
index 5cab75d..3dc700a 100644
--- a/pack.config.js
+++ b/pack.config.js
@@ -10,7 +10,7 @@ require('es.shim')
 const fs = require('iofs')
 const path = require('path')
 const chokidar = require('chokidar')
-const uglify = require('uglify-es')
+const uglify = require('terser')
 const chalk = require('chalk')
 const config = require('./package.json')
 const log = console.log
diff --git a/package.json b/package.json
index c3b3db2..d525435 100644
--- a/package.json
+++ b/package.json
@@ -14,9 +14,9 @@
   "devDependencies": {
     "chalk": "^2.4.1",
     "chokidar": "^2.0.4",
-    "es.shim": "^1.1.2",
-    "iofs": "^1.1.0",
-    "uglify-es": "^3.3.9"
+    "es.shim": "^2.0.1",
+    "iofs": "^1.5.2",
+    "terser": "^5.0.0"
   },
   "repository": "https://github.com/yutent/anot.js.git",
   "author": "yutent",