diff --git a/README.md b/README.md
index 157b4d3..a81930b 100644
--- a/README.md
+++ b/README.md
@@ -106,4 +106,3 @@ pluralize(21, 'рубль', 'рубля', 'рублей');
 # См.также
 
 + Подробно о склонении числительных в русском языке с примерами: http://numeralonline.ru/
-+ TypeScript: https://github.com/types/npm-numeralize-ru
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..73b2fe2
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,20 @@
+export = numeralize;
+
+declare function numeralize(number: number, gender?: numeralize.Gender, kase?: numeralize.Case, animate?: boolean): string;
+
+declare namespace numeralize {
+    export type Gender = number;
+    export const GENDER_MASCULINE: Gender;
+    export const GENDER_FEMININE: Gender;
+    export const GENDER_NEUTER: Gender;
+
+    export type Case = number;
+    export const CASE_NOMINATIVE: Case;
+    export const CASE_GENITIVE: Case;
+    export const CASE_DATIVE: Case;
+    export const CASE_ACCUSATIVE: Case;
+    export const CASE_INSTRUMENTAL: Case;
+    export const CASE_PREPOSITIONAL: Case;
+
+    export function pluralize(count: number, one: string, two: string, five: string): string;
+}
diff --git a/package.json b/package.json
index a09b0a2..6b46ce6 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,12 @@
 {
   "name": "numeralize-ru",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Russian numerals",
   "main": "index.js",
   "scripts": {
-    "test": "./node_modules/.bin/mocha",
+    "test": "npm run test:js; npm run test:ts",
+    "test:js": "./node_modules/.bin/mocha",
+    "test:ts": "./node_modules/.bin/tsc ./test/*.d.spec.ts --noEmit --noImplicitAny --strictNullChecks --target ES6",
     "dev": "./node_modules/.bin/mocha --watch"
   },
   "keywords": [
@@ -21,7 +23,8 @@
   "author": "anotherpit <anotherpit@gmail.com>",
   "license": "MIT",
   "devDependencies": {
-    "mocha": "^2.4.5"
+    "mocha": "^2.4.5",
+    "typescript": "^2.0.10"
   },
   "repository": {
     "type": "git",
diff --git a/test/index.d.spec.ts b/test/index.d.spec.ts
new file mode 100644
index 0000000..52d9f7b
--- /dev/null
+++ b/test/index.d.spec.ts
@@ -0,0 +1,19 @@
+import * as numeralize from '../index';
+
+let g: numeralize.Gender;
+g = numeralize.GENDER_MASCULINE;
+g = numeralize.GENDER_FEMININE;
+g = numeralize.GENDER_NEUTER;
+
+let c: numeralize.Case;
+c = numeralize.CASE_NOMINATIVE;
+c = numeralize.CASE_GENITIVE;
+c = numeralize.CASE_DATIVE;
+c = numeralize.CASE_ACCUSATIVE;
+c = numeralize.CASE_INSTRUMENTAL;
+c = numeralize.CASE_PREPOSITIONAL;
+
+let s: string;
+s = numeralize(123, g, c, true);
+s = numeralize.pluralize(123, 'рубль', 'рубля', 'рублей');
+
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..564ed18
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,7 @@
+{
+    "compilerOptions": {
+        "noImplicitAny": true,
+        "strictNullChecks": true,
+        "target": "es6"
+    }
+}