diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 648ae69..7400adf 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -19,10 +19,17 @@ See the list in `test/acceptance/useragentstrings.yml` with example user agents
 Whenever you add support for new browsers or notice a bug / mismatch, please update the list and check if all tests are still passing. Also, make sure to keep the list of browser aliases up-to-date in `src/constants.js`.
 
 For creating aliases, keep the following guidelines in mind:
- - use camelcase style for names
+ - use snake_case style for names
  - whenever possible drop the word `browser` from the original browser name
- - remove all dashes from the original browser name
+ - replace dashes with underscore
+ - avoid capital letters
  - always check for possible duplicates
+ - aliases are supposed to also be a shorter version of the original name
+
+Examples:
+`Opera Coast` --> `opera_coast`
+`UC Browser`  --> `uc`
+`SeaMonkey`   --> `sea_monkey`
 
 ## Testing
 
diff --git a/src/constants.js b/src/constants.js
index 99b543e..fe80944 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,10 +1,10 @@
 // NOTE: this list must be up-to-date with browsers listed in
 // test/acceptance/useragentstrings.yml
 const BROWSER_ALIASES_MAP = {
-  'Amazon Silk': 'amazonSilk',
+  'Amazon Silk': 'amazon_silk',
   'Android Browser': 'android',
   Bada: 'bada',
-  BlackBerry: 'blackBerry',
+  BlackBerry: 'black_berry',
   Chrome: 'chrome',
   Chromium: 'chromium',
   Epiphany: 'epiphany',
@@ -13,27 +13,27 @@ const BROWSER_ALIASES_MAP = {
   Generic: 'generic',
   Googlebot: 'googlebot',
   'Internet Explorer': 'ie',
-  'K-Meleon': 'kMeleon',
+  'K-Meleon': 'k_meleon',
   Maxthon: 'maxthon',
   'Microsoft Edge': 'edge',
   'MZ Browser': 'mz',
   'NAVER Whale Browser': 'naver',
   Opera: 'opera',
-  'Opera Coast': 'operaCoast',
-  PhantomJS: 'phantomJS',
+  'Opera Coast': 'opera_coast',
+  PhantomJS: 'phantom_js',
   Puffin: 'puffin',
-  QupZilla: 'qupZilla',
+  QupZilla: 'qup_zilla',
   Safari: 'safari',
   Sailfish: 'sailfish',
-  SeaMonkey: 'seaMonkey',
+  SeaMonkey: 'sea_monkey',
   Sleipnir: 'sleipnir',
   Swing: 'swing',
   Tizen: 'tizen',
   'UC Browser': 'uc',
   Vivaldi: 'vivaldi',
-  'WebOS Browser': 'webOS',
-  WeChat: 'weChat',
-  'Yandex Browser': 'yandex',
+  'WebOS Browser': 'web_os',
+  WeChat: 'we_chat',
+  'Yandex Browser': 'yandex'
 };
 
 module.exports = {
diff --git a/test/unit/constants.js b/test/unit/constants.js
new file mode 100644
index 0000000..a8b2be6
--- /dev/null
+++ b/test/unit/constants.js
@@ -0,0 +1,15 @@
+import test from 'ava';
+import { BROWSER_ALIASES_MAP } from '../../src/constants';
+
+test('check duplicate aliases', (t) => {
+  const aliasesList = Object.keys(BROWSER_ALIASES_MAP).map(value => (BROWSER_ALIASES_MAP[value]));
+  let foundOnce, foundTwice;
+
+  const duplicates = aliasesList.filter(item => {
+    foundOnce = aliasesList.indexOf(item);
+    foundTwice = aliasesList.indexOf(item, foundOnce + 1);
+    return +foundTwice !== -1;
+  });
+
+  t.deepEqual(duplicates, []);
+});