diff --git a/package.json b/package.json
index 33f81efc..3d7ded4c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "anchor-ui",
-  "version": "6.1.0",
+  "version": "6.1.1",
   "description": "React Component UI Kit",
   "main": "dist/index.js",
   "files": [
diff --git a/src/internal/mobile-detect.js b/src/internal/mobile-detect.js
index f544fad7..d6a91e72 100644
--- a/src/internal/mobile-detect.js
+++ b/src/internal/mobile-detect.js
@@ -1,6 +1,6 @@
 import MobileDetect from 'mobile-detect';
 import get from 'lodash/get';
 
-const userAgent = get(window, 'navigator.userAgent', '');
+const userAgent = get(get(global, 'window', {}), 'navigator.userAgent', '');
 
 export default new MobileDetect(userAgent);
diff --git a/test/internal/mobile-detect.js b/test/internal/mobile-detect.js
index b66a21a7..707dcb58 100644
--- a/test/internal/mobile-detect.js
+++ b/test/internal/mobile-detect.js
@@ -1,6 +1,7 @@
 /* eslint-env mocha */
 import { expect } from 'chai';
 import MobileDetect from 'mobile-detect';
+import md from '../../src/internal/mobile-detect';
 
 describe('MobileDetect', () => {
   beforeEach(() => {
@@ -12,8 +13,6 @@ describe('MobileDetect', () => {
   });
 
   it('should return an instance of MobileDetect', () => {
-    const md = require('../../src/internal/mobile-detect'); // eslint-disable-line global-require
-
     expect(md).to.be.an.instanceof(MobileDetect);
   });
 });