diff --git a/package-lock.json b/package-lock.json
index 5a26005..88a07a1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5938,6 +5938,12 @@
         "xml-char-classes": "https://registry.npmjs.org/xml-char-classes/-/xml-char-classes-1.0.0.tgz"
       }
     },
+    "ncp": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ncp/-/ncp-2.0.0.tgz",
+      "integrity": "sha1-GVoh1sRuNh0vsSgbo4uR6d9727M=",
+      "dev": true
+    },
     "negotiator": {
       "version": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=",
diff --git a/package.json b/package.json
index 80494d4..57d8687 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "main": "./lib/index.js",
   "module": "./es/index.js",
   "jsnext:main": "./es/index.js",
+  "typings": "lib/index.d.ts",
   "files": [
     "*.md",
     "es",
@@ -12,12 +13,13 @@
     "dist"
   ],
   "scripts": {
-    "build": "npm run build:commonjs && npm run build:es && npm run build:flow && npm run build:umd && npm run build:umd:min",
+    "build": "npm run build:commonjs && npm run build:es && npm run build:flow && npm run build:umd && npm run build:umd:min && npm run copy:ts",
     "build:commonjs": "rimraf lib && cross-env BABEL_ENV=commonjs babel ./src -d lib",
     "build:es": "rimraf es && cross-env BABEL_ENV=es babel ./src -d es",
     "build:umd": "rimraf dist && webpack --env.dev --output-filename dist/ReactLocalizeRedux.js",
     "build:umd:min": "webpack --env.prod --output-filename dist/ReactLocalizeRedux.min.js",
     "build:flow": "flow-copy-source ./src lib && flow-copy-source ./src es",
+    "copy:ts": "ncp ./src/index.d.ts ./lib/index.d.ts && ncp ./src/index.d.ts ./es/index.d.ts",
     "coverage": "jest --coverage",
     "prepublish": "npm run build",
     "start": "webpack-dev-server --config examples/webpack.config.babel.js --content-base examples --inline --open",
@@ -79,6 +81,7 @@
     "html-webpack-plugin": "^2.24.1",
     "jest": "^20.0.4",
     "json-loader": "^0.5.4",
+    "ncp": "^2.0.0",
     "progress-bar-webpack-plugin": "^1.9.1",
     "react": "^15.6.1",
     "react-addons-test-utils": "^15.6.0",
diff --git a/src/index.d.ts b/src/index.d.ts
new file mode 100644
index 0000000..2ec71fe
--- /dev/null
+++ b/src/index.d.ts
@@ -0,0 +1,122 @@
+import { ReactElement } from 'react';
+import { Selector } from 'reselect';
+import { ComponentClass } from 'react-redux';
+
+export as namespace ReactLocalizeRedux;
+
+export interface Language {
+  code: string;
+  active: boolean;
+}
+
+export interface Translations {
+  [key: string]: string[];
+}
+
+export interface Options {
+  renderInnerHtml?: boolean;
+  defaultLanguage?: string;
+}
+
+export interface LocaleState {
+  languages: Language[];
+  translations: Translations;
+  options: Options;
+}
+
+export interface TranslatedLanguage {
+  [key: string]: string;
+}
+
+export type LocalizedElement = ReactElement<'span'>|string;
+
+export interface LocalizedElementMap {
+  [key: string]: LocalizedElement;
+}
+
+export interface TranslatePlaceholderData {
+  [key: string]: string|number;
+}
+
+export type TranslateValue = string|string[];
+
+interface BaseAction<T, P> {
+  type: T;
+  payload: P;
+}
+
+export type Translate = (value: TranslateValue, data: TranslatePlaceholderData, options?: Options) => LocalizedElement|LocalizedElementMap; 
+
+type InitializePayload = {
+  languageCodes: string[],
+  options?: Options
+};
+
+type AddTranslationPayload = {
+  translation: Object
+};
+
+type AddTranslationForLanguagePayload = {
+  translation: Object,
+  language: string
+};
+
+type SetLanguagesPayload = {
+  languageCodes: string[],
+  activeLanguage?: string
+};
+
+type SetActiveLanguagePayload = {
+  languageCode: string
+};
+
+type LocalizeProps = {
+  currentLanguage: string,
+  translate: Translate
+};
+
+export type InitializeAction = BaseAction<'@@localize/INITIALIZE', InitializePayload>;
+export type AddTranslationAction = BaseAction<'@@localize/ADD_TRANSLATION', AddTranslationPayload>;
+export type AddTranslationForLanguageAction = BaseAction<'@@localize/ADD_TRANSLATION_FOR_LANGUGE', AddTranslationForLanguagePayload>;
+export type SetActiveLanguageAction = BaseAction<'@@localize/SET_ACTIVE_LANGUAGE', SetActiveLanguagePayload>;
+export type SetLanguagesAction = BaseAction<'@@localize/SET_LANGUAGES', SetLanguagesPayload>;
+
+export type Action = BaseAction<
+  string, 
+  & InitializePayload
+  & AddTranslationPayload 
+  & AddTranslationForLanguagePayload 
+  & SetActiveLanguagePayload
+  & SetLanguagesPayload
+>;
+
+export type ActionLanguageCodes = Action & { languageCodes: string[] };
+
+export interface LocalizeStateProps {
+  currentLanguage: string;
+  translate: Translate;
+}
+
+export function localeReducer(state: LocaleState, action: Action): LocaleState;
+
+export function initialize(languageCodes: string[], options: Options): InitializeAction;
+
+export function addTranslation(translation: Object): AddTranslationAction;
+
+export function addTranslationForLanguage(translation: Object, language: string): AddTranslationForLanguageAction;
+
+export function setLanguages(languageCodes: string[], activeLanguage: string): SetLanguagesAction;
+
+export function setActiveLanguage(languageCode: string): SetActiveLanguageAction;
+
+export function getTranslations(state: LocaleState): Translations;
+
+export function getLanguages(state: LocaleState): Language[];
+
+export function getOptions(state: LocaleState): Options;
+
+export function getActiveLanguage(state: LocaleState): Language;
+
+export function getTranslate(state: LocaleState): Selector<LocaleState, Translate>;
+
+export function localize(Component: ReactElement<any>, slice?: string): (state: LocaleState) => ComponentClass<LocalizeProps>;
\ No newline at end of file
diff --git a/src/modules/locale.js b/src/modules/locale.js
index 1eb2e64..f435e89 100644
--- a/src/modules/locale.js
+++ b/src/modules/locale.js
@@ -194,7 +194,7 @@ export const localeReducer = (state: LocaleState = initialState, action: Action)
 /**
  * ACTION CREATORS
  */
-export const initialize = (languageCodes: string[], options: Options = defaultTranslateOptions) => ({
+export const initialize = (languageCodes: string[], options: Options = defaultTranslateOptions): InitializeAction => ({
   type: INITIALIZE,
   payload: { languageCodes, options }
 });