diff --git a/types/validator/index.d.ts b/types/validator/index.d.ts
index c4dd7a59c3b1f9..4b06aa9bf88d39 100644
--- a/types/validator/index.d.ts
+++ b/types/validator/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for validator.js v9.0
+// Type definitions for validator.js v9.1
 // Project: https://github.com/chriso/validator.js
 // Definitions by: tgfjt <https://github.com/tgfjt>
 //                 Ilya Mochalov <https://github.com/chrootsu>
@@ -14,7 +14,7 @@ declare namespace ValidatorJS {
   type AlphanumericLocale = "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" | "da-DK" | "de-DE" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-NZ" | "en-US" | "en-ZA" | "en-ZM" | "es-ES" | "fr-FR" | "hu-HU" | "it-IT" | "nb-NO" | "nl-NL" | "nn-NO" | "pl-PL" | "pt-BR" | "pt-PT" | "ru-RU" | "sr-RS" | "sr-RS@latin" | "sv-SE" | "tr-TR" | "uk-UA";
   type DecimalLocale = "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" | "da-DK" | "de-DE" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-NZ" | "en-US" | "en-ZA" | "en-ZM" | "es-ES" | "fr-FR" | "hu-HU" | "it-IT" | "nb-NO" | "nl-NL" | "nn-NO" | "pl-PL" | "pt-BR" | "pt-PT" | "ru-RU" | "sr-RS" | "sr-RS@latin" | "sv-SE" | "tr-TR" | "uk-UA";
   type FloatLocale = "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" | "da-DK" | "de-DE" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-NZ" | "en-US" | "en-ZA" | "en-ZM" | "es-ES" | "fr-FR" | "hu-HU" | "it-IT" | "nb-NO" | "nl-NL" | "nn-NO" | "pl-PL" | "pt-BR" | "pt-PT" | "ru-RU" | "sr-RS" | "sr-RS@latin" | "sv-SE" | "tr-TR" | "uk-UA";
-  type MobilePhoneLocale = "ar-AE" | "ar-DZ" | "ar-EG" | "ar-JO" | "ar-SA" | "ar-SY" | "cs-CZ" | "de-DE" | "da-DK" | "el-GR" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-KE" | "en-NG" | "en-NZ" | "en-UG" | "en-RW" | "en-TZ" | "en-PK" | "en-US" | "en-CA" | "en-ZA" | "en-ZM" | "es-ES" | "fa-IR" | "fi-FI" | "fr-FR" | "he-IL" | "hu-HU" | "id-ID" | "it-IT" | "ja-JP" | "ko-KR" | "lt-LT" | "ms-MY" | "nb-NO" | "nn-NO" | "pl-PL" | "pt-PT" | "ro-RO" | "ru-RU" | "sk-SK" | "sr-RS" | "tr-TR" | "uk-UA" | "vi-VN" | "zh-CN" | "zh-HK" | "zh-TW" | "any";
+  type MobilePhoneLocale = "ar-AE" | "ar-DZ" | "ar-EG" | "ar-JO" | "ar-SA" | "ar-SY" | "cs-CZ" | "de-DE" | "da-DK" | "el-GR" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-KE" | "en-NG" | "en-NZ" | "en-UG" | "en-RW" | "en-TZ" | "en-PK" | "en-US" | "en-CA" | "en-ZA" | "en-ZM" | "es-ES" | "fa-IR" | "fi-FI" | "fo-FO" | "fr-FR" | "he-IL" | "hu-HU" | "id-ID" | "it-IT" | "ja-JP" | "kl-GL" | "ko-KR" | "lt-LT" | "ms-MY" | "nb-NO" | "nn-NO" | "pl-PL" | "pt-PT" | "ro-RO" | "ru-RU" | "sk-SK" | "sr-RS" | "tr-TR" | "uk-UA" | "vi-VN" | "zh-CN" | "zh-HK" | "zh-TW" | "any";
   type PostalCodeLocale = "AT" | "AU" | "BE" | "CA" | "CH" | "CZ" | "DE" | "DK" | "DZ" | "ES" | "FI" | "FR" | "GB" | "GR" | "IL" | "IN" | "IS" | "IT" | "JP" | "KE" | "LI" | "MX" | "NL" | "NO" | "PL" | "PT" | "RO" | "RU" | "SA" | "SE" | "TW" | "US" | "ZA" | "ZM" | "any"
   type HashAlgorithm = "md4" | "md5" | "sha1" | "sha256" | "sha384" | "sha512" | "ripemd128" | "ripemd160" | "tiger128" | "tiger160" | "tiger192" | "crc32" | "crc32b";
 
@@ -120,6 +120,10 @@ declare namespace ValidatorJS {
     // check if the string is a valid ISO 8601 (https://en.wikipedia.org/wiki/ISO_8601) date.
     isISO8601(str: string): boolean;
 
+    // check if the string is a valid ISO 3166-1 alpha-2 (https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) officially assigned
+    // country code.
+    isISO31661Alpha2(str: string): boolean;
+
     // check if the string is a ISRC (https://en.wikipedia.org/wiki/International_Standard_Recording_Code).
     isISRC(str: string): boolean;
 
@@ -152,10 +156,10 @@ declare namespace ValidatorJS {
     // check if the string is a mobile phone number, (locale is one of
     // ['ar-AE', ar-DZ', 'ar-EG', 'ar-JO', 'ar-SA', 'ar-SY', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR',
     // 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-KE', 'en-NG', 'en-NZ', 'en-UG', 'en-RW', 'en-TZ',
-    // 'en-PK', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fa-IR', 'fi-FI', 'fr-FR', 'he-IL',
-    // 'hu-HU', 'id-ID', 'it-IT', 'ja-JP', 'ko-KR', lt-LT', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL',
-    // 'pt-PT', 'ro-RO', 'ru-RU', 'sk-SK', 'sr-RS', 'tr-TR', 'uk-UA', 'vi-VN', 'zh-CN', 'zh-HK',
-    // 'zh-TW']).
+    // 'en-PK', 'en-US', 'en-CA', 'en-ZA', 'en-ZM', 'es-ES', 'fa-IR', 'fi-FI', 'fo-FO', 'fr-FR',
+    // 'he-IL', 'hu-HU', 'id-ID', 'it-IT', 'ja-JP', 'kl-GL', 'ko-KR', lt-LT', 'ms-MY', 'nb-NO',
+    // 'nn-NO', 'pl-PL', 'pt-PT', 'ro-RO', 'ru-RU', 'sk-SK', 'sr-RS', 'tr-TR', 'uk-UA', 'vi-VN',
+    // 'zh-CN', 'zh-HK', 'zh-TW']).
     isMobilePhone(str: string, locale: MobilePhoneLocale): boolean;
 
     // check if the string is a valid hex-encoded representation of a MongoDB ObjectId
@@ -511,6 +515,11 @@ declare module "validator/lib/isISO8601" {
   export = isISO8601;
 }
 
+declare module "validator/lib/isISO31661Alpha2" {
+  const isISO31661Alpha2: typeof validator.isISO31661Alpha2;
+  export = isISO31661Alpha2;
+}
+
 declare module "validator/lib/isISRC" {
   const isISRC: typeof validator.isISRC;
   export = isISRC;
diff --git a/types/validator/validator-tests.ts b/types/validator/validator-tests.ts
index 02d0510be26e3b..bcc7418b6f9f6e 100644
--- a/types/validator/validator-tests.ts
+++ b/types/validator/validator-tests.ts
@@ -35,6 +35,7 @@ import isIPFunc = require('validator/lib/isIP');
 import isISBNFunc = require('validator/lib/isISBN');
 import isISINFunc = require('validator/lib/isISIN');
 import isISO8601Func = require('validator/lib/isISO8601');
+import isISO31661Alpha2Func = require('validator/lib/isISO31661Alpha2');
 import isISRCFunc = require('validator/lib/isISRC');
 import isInFunc = require('validator/lib/isIn');
 import isIntFunc = require('validator/lib/isInt');
@@ -161,6 +162,9 @@ import whitelistFunc = require('validator/lib/whitelist');
   let _isISO8601 = validator.isISO8601;
   _isISO8601 = isISO8601Func;
 
+  let _isISO31661Alpha2 = validator.isISO31661Alpha2;
+  _isISO31661Alpha2 = isISO31661Alpha2Func;
+
   let _isISRC = validator.isISRC;
   _isISRC = isISRCFunc;
 
@@ -450,6 +454,8 @@ let any: any;
 
   result = validator.isISO8601('sample');
 
+  result = validator.isISO31661Alpha2('sample');
+
   result = validator.isISRC('sample');
 
   result = validator.isIn('sample', []);
@@ -501,12 +507,14 @@ let any: any;
   result = validator.isMobilePhone('sample', 'es-ES');
   result = validator.isMobilePhone('sample', 'fa-IR');
   result = validator.isMobilePhone('sample', 'fi-FI');
+  result = validator.isMobilePhone('sample', 'fo-FO');
   result = validator.isMobilePhone('sample', 'fr-FR');
   result = validator.isMobilePhone('sample', 'he-IL');
   result = validator.isMobilePhone('sample', 'hu-HU');
   result = validator.isMobilePhone('sample', 'id-ID');
   result = validator.isMobilePhone('sample', 'it-IT');
   result = validator.isMobilePhone('sample', 'ja-JP');
+  result = validator.isMobilePhone('sample', 'kl-GL');
   result = validator.isMobilePhone('sample', 'ko-KR');
   result = validator.isMobilePhone('sample', 'lt-LT');
   result = validator.isMobilePhone('sample', 'ms-MY');