diff --git a/.travis.yml b/.travis.yml
index 77f7084..9e8d70a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,11 +2,11 @@ language: node_js
 node_js:
   - "node"
   - "lts/*"
+  - "10"
   - "8"
-  - "6"
 
 install: yarn install
 script:
-  - yarn global add esformatter
+  - yarn add --dev esformatter
   - yarn run build
   - yarn test
diff --git a/package.json b/package.json
index 9213b81..25894d6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "qingstor-sdk",
-  "version": "2.2.16",
+  "version": "2.3.0",
   "description": "Official QingStor SDK for JavaScript",
   "main": "./dist/node/qingstor-sdk.min.js",
   "directories": {
@@ -24,7 +24,7 @@
     "dist": "gulp tar zip",
     "generate": "snips -f='./specs/qingstor/2016-01-06/swagger/api_v2.0.json' -t='./template' -o='./src/qingstor'; rm ./src/qingstor/object.js; npm run format;",
     "test": "mocha --require @babel/register -t 10000",
-    "format": "esformatter -i 'src/**/*.js' 'lib/**/*.js' 'test/**/*.js' 'scenarios/tests/*.js' '*.js';"
+    "format": "./node_modules/.bin/esformatter -i 'src/**/*.js' 'lib/**/*.js' 'test/**/*.js' 'scenarios/tests/*.js' '*.js';"
   },
   "keywords": [
     "qingstor",
diff --git a/src/version.js b/src/version.js
index 57c2952..1c65611 100644
--- a/src/version.js
+++ b/src/version.js
@@ -14,4 +14,4 @@
 // | limitations under the License.
 // +-------------------------------------------------------------------------
 
-global.version = '2.2.16';
+global.version = '2.3.0';
diff --git a/webpack.config.js b/webpack.config.js
index 2693687..402684c 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -45,7 +45,7 @@ const browserConfig = {
   output: {
     path: path.resolve(__dirname, 'dist'),
     filename: 'browser/qingstor-sdk.js',
-    libraryTarget: "var",
+    libraryTarget: "umd",
     library: "qingstor_sdk"
   },
   plugins: [