diff --git a/types/countries-and-timezones/countries-and-timezones-tests.ts b/types/countries-and-timezones/countries-and-timezones-tests.ts
index a73344aa88..4d7e1df64d 100644
--- a/types/countries-and-timezones/countries-and-timezones-tests.ts
+++ b/types/countries-and-timezones/countries-and-timezones-tests.ts
@@ -1,6 +1,8 @@
 import * as lib from 'countries-and-timezones';
 
+lib.getCountry('IT');
+lib.getTimezone('Europe/Warsaw');
 lib.getAllCountries();
 lib.getAllTimezones();
-lib.getCountriesForTimezone('Europe/London');
+lib.getCountryForTimezone('Europe/London');
 lib.getTimezonesForCountry('GB');
diff --git a/types/countries-and-timezones/index.d.ts b/types/countries-and-timezones/index.d.ts
index 3a84ea3b76..f410e37603 100644
--- a/types/countries-and-timezones/index.d.ts
+++ b/types/countries-and-timezones/index.d.ts
@@ -1,25 +1,28 @@
-// Type definitions for countries-and-timezones 1.0
+// Type definitions for countries-and-timezones 2.0
 // Project: https://github.com/manuelmhtr/countries-and-timezones#readme
 // Definitions by: David Bird <https://github.com/zero51>
+//                 Piotr Okoński <https://github.com/pokonski>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export interface Country {
 	id: string;
 	name: string;
-	timezones: string[];
+	timezones: ReadonlyArray<string>;
 }
 
 export interface Timezone {
 	name: string;
 	utcOffset: number;
-	offsetStr: string;
-	countries: string[];
+	utcOffsetStr: string;
+	dstOffset: number;
+	dstOffsetStr: string;
+	aliasOf: string | null;
+	country: string | null;
 }
 
-export function getAllCountries(): {[key: string]: Country};
-
-export function getAllTimezones(): {[key: string]: Timezone};
-
-export function getCountriesForTimezone(timezoneId: string): Country[];
-
-export function getTimezonesForCountry(countryId: string): Timezone[];
+export function getCountry(id: string): Country;
+export function getTimezone(name: string): Timezone;
+export function getAllCountries(): Country[];
+export function getAllTimezones(): Timezone[];
+export function getCountryForTimezone(name: string): Country;
+export function getTimezonesForCountry(id: string): Timezone[];