diff --git a/build/webpack.node.js b/build/webpack.node.js
index fd1d391b..76bd5cb5 100644
--- a/build/webpack.node.js
+++ b/build/webpack.node.js
@@ -22,6 +22,14 @@ const  nodeConfig = {
       // 'scryptsy$': '../scrypt-polyfill.js',
     }
   },
+  externals: {
+    'node-fetch': {
+      commonjs2: 'node-fetch',
+      commonjs: 'node-fetch',
+      umd: 'node-fetch',
+      root: 'node-fetch'
+    }
+  },
   target: 'node',
   optimization: {
     removeEmptyChunks: true,
diff --git a/package.json b/package.json
index 799ca5ca..9fd12a8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aelf-sdk",
-  "version": "3.4.14",
+  "version": "3.4.14-beta.1",
   "description": "aelf-sdk js library",
   "main": "dist/aelf.cjs.js",
   "browser": "dist/aelf.umd.js",