diff --git a/.eslintrc b/.eslintrc
index 412388a..ce5c2ae 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -4,6 +4,8 @@
     "comma-dangle": [2, "never"],
     "no-param-reassign": 0,
     "prefer-rest-params": 0,
-    "no-underscore-dangle": 0
+    "no-underscore-dangle": 0,
+    "no-void": 0,
+    "no-mixed-operators": 0
   }
 }
diff --git a/package.json b/package.json
index 4ef7e23..27513e1 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "es-ajax",
   "description": "Ajax (fetch or xhr2) with promises - an useful JavaScript library for convenient work with ajax requests in a browser.",
-  "version": "1.1.5",
+  "version": "1.1.6",
   "main": "src/index.js",
   "files": [
     "src",
@@ -38,34 +38,34 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "es-middleware": "^1.1.1",
-    "object-hash": "^1.1.2",
-    "qs": "^6.2.0"
+    "es-middleware": "^1.1.3",
+    "object-hash": "^1.1.4",
+    "qs": "^6.2.1"
   },
   "devDependencies": {
-    "babel-cli": "^6.9.0",
-    "babel-core": "^6.9.0",
+    "babel-cli": "^6.11.4",
+    "babel-core": "^6.13.2",
     "babel-loader": "^6.2.4",
     "babel-plugin-transform-export-extensions": "^6.8.0",
     "babel-plugin-transform-object-rest-spread": "^6.8.0",
-    "babel-polyfill": "^6.9.0",
-    "babel-preset-es2015": "^6.9.0",
-    "babel-preset-stage-2": "^6.5.0",
-    "eslint": "^2.10.2",
-    "eslint-config-airbnb": "^9.0.1",
-    "eslint-loader": "^1.3.0",
-    "eslint-plugin-import": "^1.9.0",
-    "eslint-plugin-jsx-a11y": "^1.2.2",
-    "eslint-plugin-react": "^5.1.1",
-    "expect": "^1.20.1",
-    "karma": "^0.13.22",
-    "karma-mocha": "^1.0.1",
-    "karma-phantomjs-launcher": "^1.0.0",
+    "babel-polyfill": "^6.13.0",
+    "babel-preset-es2015": "^6.13.2",
+    "babel-preset-stage-2": "^6.13.0",
+    "eslint": "^3.2.2",
+    "eslint-config-airbnb": "^10.0.0",
+    "eslint-loader": "^1.5.0",
+    "eslint-plugin-import": "^1.12.0",
+    "eslint-plugin-jsx-a11y": "^2.1.0",
+    "eslint-plugin-react": "^6.0.0",
+    "expect": "^1.20.2",
+    "karma": "^1.1.2",
+    "karma-mocha": "^1.1.1",
+    "karma-phantomjs-launcher": "^1.0.1",
     "karma-sinon": "^1.0.5",
-    "karma-webpack": "^1.7.0",
-    "mocha": "^2.5.3",
-    "phantomjs-prebuilt": "^2.1.7",
-    "sinon": "^1.17.4",
+    "karma-webpack": "^1.8.0",
+    "mocha": "^3.0.2",
+    "phantomjs-prebuilt": "^2.1.11",
+    "sinon": "^1.17.5",
     "webpack": "^1.13.1"
   },
   "engines": {
diff --git a/src/ajax.js b/src/ajax.js
index 0654389..5145367 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -1,16 +1,17 @@
-import guid from './utils/guid';
-import factory from './utils/factory';
-import { contentTypes } from './utils/content-types';
 import objectHash from 'object-hash';
-import { is } from './utils/is';
 import Middleware from 'es-middleware';
 
+import guid from './utils/guid';
+import factory from './utils/factory';
+import contentTypes from './utils/content-types';
+import is from './utils/is';
+
 const _requests = new Set();
 const _meta = new Map();
 const mw = new Middleware();
 let _timeout = 0;
 
-export function ajax(url, parameters = {}) {
+export default function ajax(url, parameters = {}) {
   const defaults = {
     isSingleton: false,
     api: 'xhr', // xhr || fetch
diff --git a/src/driver/fetch.js b/src/driver/fetch.js
index 1ff9e02..fa43030 100644
--- a/src/driver/fetch.js
+++ b/src/driver/fetch.js
@@ -1,7 +1,9 @@
+/* global fetch, Headers */
+
 import XhrAbstract from './xhr-abstract';
 import internal from './utils/internal';
-import { methods } from './utils/methods';
-import { is } from '../utils/is';
+import methods from './utils/methods';
+import is from '../utils/is';
 
 export default class FetchDriver extends XhrAbstract {
   constructor(url, request = {}, headers = {}) {
diff --git a/src/driver/utils/methods.js b/src/driver/utils/methods.js
index 271dc7b..ae11924 100644
--- a/src/driver/utils/methods.js
+++ b/src/driver/utils/methods.js
@@ -1,4 +1,4 @@
-export const methods = {
+export default {
   head: 'HEAD',
   options: 'OPTIONS',
   get: 'GET',
diff --git a/src/driver/xhr-abstract.js b/src/driver/xhr-abstract.js
index 1273719..b8618f8 100644
--- a/src/driver/xhr-abstract.js
+++ b/src/driver/xhr-abstract.js
@@ -1,7 +1,7 @@
-import { methods } from './utils/methods';
+import methods from './utils/methods';
 import internal from './utils/internal';
 import methodsOverride from './utils/methods-override';
-import { is } from '../utils/is';
+import is from '../utils/is';
 
 export default class XhrAbstract {
   constructor(/* url, request = {}, headers = {} */) {
diff --git a/src/driver/xhr.js b/src/driver/xhr.js
index 0420056..5390d48 100644
--- a/src/driver/xhr.js
+++ b/src/driver/xhr.js
@@ -1,10 +1,12 @@
+/* global XMLHttpRequest */
+
 import qs from 'qs';
 import internal from './utils/internal';
 import XhrAbstract from './xhr-abstract';
 import { rejectInterface, resolveInterface } from './utils/resolve-reject-interface';
-import { methods } from './utils/methods';
+import methods from './utils/methods';
 import asObject from './utils/as-object';
-import { is } from '../utils/is';
+import is from '../utils/is';
 
 export default class XhrDriver extends XhrAbstract {
   constructor(url, request = {}, headers = {}) {
diff --git a/src/index.js b/src/index.js
index 38dd4e8..ad128c0 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1 +1 @@
-module.exports = require('./ajax').ajax;
+module.exports = require('./ajax').default;
diff --git a/src/utils/content-types.js b/src/utils/content-types.js
index 00b19fb..e526792 100644
--- a/src/utils/content-types.js
+++ b/src/utils/content-types.js
@@ -1,4 +1,4 @@
-export const contentTypes = {
+export default {
   text: 'text/plain',
   html: 'text/html',
   json: 'application/json'
diff --git a/src/utils/is.js b/src/utils/is.js
index 32477b8..335dc80 100644
--- a/src/utils/is.js
+++ b/src/utils/is.js
@@ -1,4 +1,4 @@
-export const is = {
+export default {
   _undefined(value) {
     return value === void 0;
   },
diff --git a/webpack.config.js b/webpack.config.js
index 3fe2bb0..ba4a06b 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -25,7 +25,7 @@ if (isProduction) {
 }
 
 module.exports = {
-  devtool: !isProduction ? 'cheap-source-map' : 'eval',
+  devtool: isProduction ? 'cheap-source-map' : 'eval',
   entry: './src/index.js',
   watch: false,
   output: {