diff --git a/lib/utils.js b/lib/utils.js
index 0b3046a..e3106b1 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -568,7 +568,7 @@ exports.localeId = function (ids, toOld) {
 }
 
 /**
- * Transform with babel, and minify with uglify
+ * Transform with babel, and minify with terser
  *
  * @param {string} code
  * @returns {string}
@@ -584,15 +584,15 @@ exports.parseJs = jsParser();
 exports.minifyHtml = htmlMinifier();
 
 function jsParser() {
-  let babel, uglify;
+  let babel, terser;
   try {
-    uglify = require('uglify-js');
+    terser = require('terser');
     babel = require('babel-core');
     require('babel-preset-env');
   } catch (e) { return i => i || '' }
 
   const esSafe = code => babel.transform(code, { presets: [['env', { 'modules': false }]] });
-  const minify = uglify.minify;
+  const minify = terser.minify;
 
   return function (code) {
     if (!code || typeof code !== 'string') return '';
@@ -747,5 +747,5 @@ exports.parseBackground = function (value) {
 }
 
 exports.isExternal = function (link) {
-  return !!link.match(/^(\w+:)?\/\/\w+\.\w+/);
+  return /^(\w+:)?\/\//.test(link);
 }
diff --git a/package.json b/package.json
index 708134d..2789ed8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-inside",
-  "version": "2.5.1",
+  "version": "2.5.2",
   "description": "❤️ SPA, flat and clean theme for Hexo.",
   "scripts": {
     "test": "jasmine --config=test/jasmine.json"
@@ -28,6 +28,6 @@
     "babel-preset-env": "1.7.0",
     "hexo": "4.0.0",
     "jasmine": "3.5.0",
-    "uglify-js": "3.6.7"
+    "terser": "4.4.0"
   }
 }