diff --git a/README.md b/README.md
index 911d3b530..bf31c8a8e 100644
--- a/README.md
+++ b/README.md
@@ -55,8 +55,8 @@ Passing anything other than a string is an error.
 - **contains(str, seed)** - check if the string contains the seed.
 - **equals(str, comparison)** - check if the string matches the comparison.
 - **isAfter(str [, date])** - check if the string is a date that's after the specified date (defaults to now).
-- **isAlpha(str [, locale])** - check if the string contains only letters (a-zA-Z). Locale is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU', 'nl-NL', 'pl-PL', 'pt-PT', 'ru-RU', 'tr-TR']`) and defaults to `en-US`.
-- **isAlphanumeric(str [, locale])** - check if the string contains only letters and numbers. Locale is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU', 'nl-NL', 'pl-PL', 'pt-PT', 'ru-RU', 'tr-TR']`) and defaults to `en-US`.
+- **isAlpha(str [, locale])** - check if the string contains only letters (a-zA-Z). Locale is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU', 'nl-NL', 'pl-PL', 'pt-PT', 'ru-RU', sr-RS, 'sr-RS@latin', 'tr-TR']`) and defaults to `en-US`.
+- **isAlphanumeric(str [, locale])** - check if the string contains only letters and numbers. Locale is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU', 'nl-NL', 'pl-PL', 'pt-PT', 'ru-RU', sr-RS, 'sr-RS@latin', 'tr-TR']`) and defaults to `en-US`.
 - **isAscii(str)** - check if the string contains ASCII chars only.
 - **isBase64(str)** - check if a string is base64 encoded.
 - **isBefore(str [, date])** - check if the string is a date that's before the specified date.
@@ -86,7 +86,7 @@ Passing anything other than a string is an error.
 - **isLowercase(str)** - check if the string is lowercase.
 - **isMACAddress(str)** - check if the string is a MAC address.
 - **isMD5(str)** - check if the string is a MD5 hash.
-- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-DZ', 'ar-SA', 'ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL', 'pt-PT', 'ru-RU', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
+- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['ar-DZ', 'ar-SA', 'ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fi-FI', 'fr-FR', 'hu-HU', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL', 'pt-PT', 'ru-RU', sr-RS, 'sr-RS@latin', 'tr-TR', 'vi-VN', 'zh-CN', 'zh-TW']`).
 - **isMongoId(str)** - check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
 - **isMultibyte(str)** - check if the string contains one or more multibyte chars.
 - **isNull(str)** - check if the string is null (has a length of zero).
diff --git a/lib/alpha.js b/lib/alpha.js
index 1d97cd37b..f721da538 100644
--- a/lib/alpha.js
+++ b/lib/alpha.js
@@ -13,9 +13,11 @@ var alpha = exports.alpha = {
   'hu-HU': /^[A-ZÁÉÍÓÖŐÚÜŰ]+$/i,
   'pl-PL': /^[A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
   'pt-PT': /^[A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
-  'ru-RU': /^[А-ЯЁа-яё]+$/i,
+  'ru-RU': /^[А-ЯЁ]+$/i,
+  'sr-RS@latin': /^[A-ZČĆŽŠĐ]+$/i,
+  'sr-RS': /^[А-ЯЂЈЉЊЋЏ]+$/i,
   'tr-TR': /^[A-ZÇĞİıÖŞÜ]+$/i,
-  ar: /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
+  'ar': /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
 };
 
 var alphanumeric = exports.alphanumeric = {
@@ -28,9 +30,11 @@ var alphanumeric = exports.alphanumeric = {
   'nl-NL': /^[0-9A-ZÉËÏÓÖÜ]+$/i,
   'pl-PL': /^[0-9A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
   'pt-PT': /^[0-9A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
-  'ru-RU': /^[0-9А-ЯЁа-яё]+$/i,
+  'ru-RU': /^[0-9А-ЯЁ]+$/i,
+  'sr-RS@latin': /^[0-9A-ZČĆŽŠĐ]+$/i,
+  'sr-RS':/^[0-9А-ЯЂЈЉЊЋЏ]+$/i,
   'tr-TR': /^[0-9A-ZÇĞİıÖŞÜ]+$/i,
-  ar: /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
+  'ar': /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
 };
 
 var englishLocales = exports.englishLocales = ['AU', 'GB', 'HK', 'IN', 'NZ', 'ZA', 'ZM'];
diff --git a/lib/isMobilePhone.js b/lib/isMobilePhone.js
index 95b460484..15fd2093d 100644
--- a/lib/isMobilePhone.js
+++ b/lib/isMobilePhone.js
@@ -39,6 +39,7 @@ var phones = {
   'pt-BR': /^(\+?55|0)\-?[1-9]{2}\-?[2-9]{1}\d{3,4}\-?\d{4}$/,
   'pt-PT': /^(\+?351)?9[1236]\d{7}$/,
   'ru-RU': /^(\+?7|8)?9\d{9}$/,
+  'sr-RS': /^(\+3816|06)[- \d]{5,9}$/,
   'tr-TR': /^(\+?90|0)?5\d{9}$/,
   'vi-VN': /^(\+?84|0)?((1(2([0-9])|6([2-9])|88|99))|(9((?!5)[0-9])))([0-9]{7})$/,
   'zh-CN': /^(\+?0?86\-?)?1[345789]\d{9}$/,
diff --git a/src/lib/alpha.js b/src/lib/alpha.js
index 112eb5e2c..e05105b40 100644
--- a/src/lib/alpha.js
+++ b/src/lib/alpha.js
@@ -8,9 +8,11 @@ export const alpha = {
   'hu-HU': /^[A-ZÁÉÍÓÖŐÚÜŰ]+$/i,
   'pl-PL': /^[A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
   'pt-PT': /^[A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
-  'ru-RU': /^[А-ЯЁа-яё]+$/i,
+  'ru-RU': /^[А-ЯЁ]+$/i,
+  'sr-RS@latin': /^[A-ZČĆŽŠĐ]+$/i,
+  'sr-RS': /^[А-ЯЂЈЉЊЋЏ]+$/i,
   'tr-TR': /^[A-ZÇĞİıÖŞÜ]+$/i,
-  ar: /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
+  'ar': /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
 };
 
 export const alphanumeric = {
@@ -23,9 +25,11 @@ export const alphanumeric = {
   'nl-NL': /^[0-9A-ZÉËÏÓÖÜ]+$/i,
   'pl-PL': /^[0-9A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
   'pt-PT': /^[0-9A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
-  'ru-RU': /^[0-9А-ЯЁа-яё]+$/i,
+  'ru-RU': /^[0-9А-ЯЁ]+$/i,
+  'sr-RS@latin': /^[0-9A-ZČĆŽŠĐ]+$/i,
+  'sr-RS':/^[0-9А-ЯЂЈЉЊЋЏ]+$/i,
   'tr-TR': /^[0-9A-ZÇĞİıÖŞÜ]+$/i,
-  ar: /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
+  'ar': /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
 };
 
 export const englishLocales = ['AU', 'GB', 'HK', 'IN', 'NZ', 'ZA', 'ZM'];
diff --git a/src/lib/isMobilePhone.js b/src/lib/isMobilePhone.js
index 42db9c959..09765c7cf 100644
--- a/src/lib/isMobilePhone.js
+++ b/src/lib/isMobilePhone.js
@@ -28,6 +28,7 @@ const phones = {
   'pt-BR': /^(\+?55|0)\-?[1-9]{2}\-?[2-9]{1}\d{3,4}\-?\d{4}$/,
   'pt-PT': /^(\+?351)?9[1236]\d{7}$/,
   'ru-RU': /^(\+?7|8)?9\d{9}$/,
+  'sr-RS': /^(\+3816|06)[- \d]{5,9}$/,
   'tr-TR': /^(\+?90|0)?5\d{9}$/,
   'vi-VN': /^(\+?84|0)?((1(2([0-9])|6([2-9])|88|99))|(9((?!5)[0-9])))([0-9]{7})$/,
   'zh-CN': /^(\+?0?86\-?)?1[345789]\d{9}$/,
diff --git a/test/validators.js b/test/validators.js
index d77b0ca7b..582ca3378 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -635,6 +635,39 @@ describe('Validators', function () {
     });
   });
 
+  it('should validate serbian cyrillic alpha strings', function () {
+    test({
+      validator: 'isAlphanumeric',
+      args: ['sr-RS'],
+      valid: [
+        'ШћжЂљЕ',
+        'ЧПСТЋЏ',
+      ],
+      invalid: [
+        'řiď ',
+        'blé33!!',
+        'föö!!',
+      ],
+    });
+  });
+
+  it('should validate serbian latin alpha strings', function () {
+    test({
+      validator: 'isAlphanumeric',
+      args: ['sr-RS@latin'],
+      valid: [
+        'ŠAabčšđćž',
+        'ŠATROĆčđš',
+      ],
+      invalid: [
+        '12řiď ',
+        'blé!!',
+        'föö!2!',
+      ],
+    });
+  });
+
+
   it('should validate defined arabic locales alpha strings', function () {
     test({
       validator: 'isAlpha',
@@ -809,6 +842,38 @@ describe('Validators', function () {
     });
   });
 
+  it('should validate serbian cyrillic alphanumeric strings', function () {
+    test({
+      validator: 'isAlphanumeric',
+      args: ['sr-RS'],
+      valid: [
+        'ШћжЂљЕ123',
+        'ЧПСТ132ЋЏ',
+      ],
+      invalid: [
+        'řiď ',
+        'blé!!',
+        'föö!!',
+      ],
+    });
+  });
+
+  it('should validate serbian latin alphanumeric strings', function () {
+    test({
+      validator: 'isAlphanumeric',
+      args: ['sr-RS@latin'],
+      valid: [
+        'ŠAabčšđćž123',
+        'ŠATRO11Ćčđš',
+      ],
+      invalid: [
+        'řiď ',
+        'blé!!',
+        'föö!!',
+      ],
+    });
+  });
+
   it('should validate turkish alphanumeric strings', function () {
     test({
       validator: 'isAlphanumeric',
@@ -2164,6 +2229,29 @@ describe('Validators', function () {
       args: ['ru-RU'],
     });
 
+    test({
+      validator: 'isMobilePhone',
+      valid: [
+        '0640133338',
+        '063333133',
+        '0668888878',
+        '+381645678912',
+        '+381611314000',
+        '0655885010'
+      ],
+      invalid: [
+        '12345',
+        '',
+        'Vml2YW11cyBmZXJtZtesting123',
+        '010-38238383',
+        '+9676338855',
+        '19676338855',
+        '6676338855',
+        '+99676338855',
+      ],
+      args: ['sr-RS'],
+    });
+
     test({
       validator: 'isMobilePhone',
       valid: [