diff --git a/npm/janus.d.ts b/npm/janus.d.ts
new file mode 100644
index 0000000000..78470d9df7
--- /dev/null
+++ b/npm/janus.d.ts
@@ -0,0 +1,146 @@
+declare namespace JanusJS {
+	interface Dependencies {
+		adapter: any;
+		newWebSocket: (server: string, protocol: string) => WebSocket;
+		isArray: (array: any) => array is Array<any>;
+		checkJanusExtension: () => boolean;
+		httpAPICall: (url: string, options: any) => void;
+	}
+
+	enum DebugLevel {
+		Trace = 'trace',
+		Debug = 'debug',
+		Log = 'log',
+		Warning = 'warn',
+		Error = 'error'
+	}
+
+	interface JSEP {}
+
+	interface InitOptions {
+		debug?: boolean | 'all' | DebugLevel[];
+		callback?: Function;
+		dependencies?: Dependencies;
+	}
+
+	interface ConstuctorOptions {
+		server: string | string[];
+		iceServers?: string[];
+		ipv6?: boolean;
+		withCredentials?: boolean;
+		max_poll_events?: number;
+		destroyOnUnload?: boolean;
+		token?: string;
+		apisecret?: string;
+		success?: Function;
+		error?: (error: any) => void;
+		destroyed?: Function;
+	}
+
+	enum MessageType {
+		Recording = 'recording',
+		Stopped = 'stopped',
+		SlowLink = 'slow_link',
+		Preparing = 'preparing',
+		Refreshing = 'refreshing'
+	}
+
+	interface Message {
+		result?: {
+			status: MessageType;
+			id?: string;
+			uplink?: number;
+		};
+	}
+
+	interface PluginOptions {
+		plugin: string;
+		opaqueId?: string;
+		success?: (handle: PluginHandle) => void;
+		error?: (error: any) => void;
+		consentDialog?: (on: boolean) => void;
+		webrtcState?: (isConnected: boolean) => void;
+		iceState?: (state: 'connected' | 'failed') => void;
+		mediaState?: (state: { type: 'audio' | 'video'; on: boolean }) => void;
+		slowLink?: (state: { uplink: boolean }) => void;
+		onmessage?: (message: Message, jsep?: JSEP) => void;
+		onlocalstream?: (stream: MediaStream) => void;
+		onremotestream?: (stream: MediaStream) => void;
+		ondataopen?: Function;
+		ondata?: Function;
+		oncleanup?: Function;
+		detached?: Function;
+	}
+
+	interface OfferParams {
+		media?: {
+			audioSend?: boolean;
+			audioRecv?: boolean;
+			videoSend?: boolean;
+			videoRecv?: boolean;
+			audio?: boolean | { deviceId: string };
+			video?:
+				| boolean
+				| { deviceId: string }
+				| 'lowres'
+				| 'lowres-16:9'
+				| 'stdres'
+				| 'stdres-16:9'
+				| 'hires'
+				| 'hires-16:9';
+			data?: boolean;
+			failIfNoAudio?: boolean;
+			failIfNoVideo?: boolean;
+			screenshareFrameRate?: number;
+		};
+		trickle?: boolean;
+		stream?: MediaStream;
+		success: Function;
+		error: (error: any) => void;
+	}
+
+	interface PluginMessage {
+		message: {
+			request: string;
+			[otherProps: string]: any;
+		};
+		jsep?: JSEP;
+	}
+
+	interface PluginHandle {
+		getId(): string;
+		getPlugin(): string;
+		send(message: PluginMessage): void;
+		createOffer(params: any): void;
+		createAnswer(params: any): void;
+		handleRemoteJsep(params: { jsep: JSEP }): void;
+		dtmf(params: any): void;
+		data(params: any): void;
+		getBitrate(): number;
+		hangup(sendRequest?: boolean): void;
+		detach(params: any): void;
+	}
+
+	class Janus {
+		static useDefaultDependencies(deps: Partial<Dependencies>): Dependencies;
+		static useOldDependencies(deps: Partial<Dependencies>): Dependencies;
+		static init(options: InitOptions): void;
+		static isWebrtcSupported(): boolean;
+		static debug(...args: any[]): void;
+		static log(...args: any[]): void;
+		static warn(...args: any[]): void;
+		static error(...args: any[]): void;
+		static randomString(length: number): string;
+
+		constructor(options: ConstuctorOptions);
+
+		getServer(): string;
+		isConnected(): boolean;
+		getSessionId(): string;
+		attach(options: PluginOptions): void;
+		destroy(): void;
+	}
+}
+
+export default JanusJS.Janus;
+export { JanusJS };
diff --git a/npm/package.json b/npm/package.json
index cad55d92f6..1a35bcc377 100644
--- a/npm/package.json
+++ b/npm/package.json
@@ -1,14 +1,16 @@
 {
-  "name": "janus",
-  "description": "The Janus WebRTC Server",
-  "author": "Meetecho",
-  "license": "GPL-3.0",
-  "repository": "github:meetecho/janus-gateway",
-  "scripts": {
-    "rollup": "rollup -c rollup.config.js"
-  },
-  "devDependencies": {
-    "rollup": "^0.50.0",
-    "rollup-plugin-replace": "^2.0.0"
-  }
+	"name": "janus",
+	"description": "The Janus WebRTC Server",
+	"author": "Meetecho",
+	"license": "GPL-3.0",
+	"repository": "github:meetecho/janus-gateway",
+	"types": "janus.d.ts",
+	"typings": "janus.d.ts",
+	"scripts": {
+		"rollup": "rollup -c rollup.config.js"
+	},
+	"devDependencies": {
+		"rollup": "^0.50.0",
+		"rollup-plugin-replace": "^2.0.0"
+	}
 }