diff --git a/package.json b/package.json
index 11b0f079..8ef7057c 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "level-js": "^2.2.4",
     "mocha": "^3.4.1",
     "node-loader": "^0.6.0",
-    "uglify-es-webpack-plugin": "^0.0.2",
+    "uglifyjs-webpack-plugin": "^1.0.0-beta.1",
     "webpack": "^3.0.0"
   },
   "main": "./lib/bcoin.js",
diff --git a/webpack.browser.js b/webpack.browser.js
index ad52c8ac..999ea1f6 100644
--- a/webpack.browser.js
+++ b/webpack.browser.js
@@ -2,7 +2,7 @@
 
 const webpack = require('webpack')
 const path = require('path');
-const UglifyEsPlugin = require('uglify-es-webpack-plugin');
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 const str = JSON.stringify;
 const env = process.env;
 
@@ -29,6 +29,6 @@ module.exports = {
       'process.env.BCOIN_MASTER_URL':
         str(env.BCOIN_MASTER_URL || '/bcoin-master.js')
     }),
-    new UglifyEsPlugin()
+    new UglifyJsPlugin()
   ]
 };
diff --git a/webpack.node.js b/webpack.node.js
index fba6bd0f..6a1d1e62 100644
--- a/webpack.node.js
+++ b/webpack.node.js
@@ -2,7 +2,7 @@
 
 const webpack = require('webpack')
 const path = require('path');
-const UglifyEsPlugin = require('uglify-es-webpack-plugin');
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 const str = JSON.stringify;
 const env = process.env;
 
@@ -39,6 +39,7 @@ module.exports = {
       'process.env.BCOIN_WORKER_FILE':
         str(env.BCOIN_WORKER_FILE || 'bcoin-worker.js')
     }),
-    new UglifyEsPlugin()
+    new webpack.IgnorePlugin(/^utf-8-validate|bufferutil$/),
+    new UglifyJsPlugin()
   ]
 };