diff --git a/lib/@types/index.d.ts b/lib/@types/index.d.ts
index acf9651..71866ec 100644
--- a/lib/@types/index.d.ts
+++ b/lib/@types/index.d.ts
@@ -1,156 +1,154 @@
-declare module 'drachtio-srf' {
-    import { Socket } from 'net';
-    import { EventEmitter } from 'events';
+import { Socket } from 'net';
+import { EventEmitter } from 'events';
 
-    namespace Srf {
-      type SipMethod = 'ACK' | 'BYE' | 'CANCEL' | 'INFO' | 'INVITE' | 'MESSAGE' | 'NOTIFY' | 'OPTIONS' | 'PRACK' | 'PUBLISH' | 'REFER' | 'REGISTER' | 'SUBSCRIBE' | 'UPDATE';
-      type SipMessageHeaders = Record<string, string>;
-      type AOR = { name: string; uri: string; params?: Record<string, any>; };
+declare namespace Srf {
+  type SipMethod = 'ACK' | 'BYE' | 'CANCEL' | 'INFO' | 'INVITE' | 'MESSAGE' | 'NOTIFY' | 'OPTIONS' | 'PRACK' | 'PUBLISH' | 'REFER' | 'REGISTER' | 'SUBSCRIBE' | 'UPDATE';
+  type SipMessageHeaders = Record<string, string>;
+  type AOR = { name: string; uri: string; params?: Record<string, any>; };
 
-      export interface SrfConfig {
-        apiSecret?: string;
-        host?: string;
-        port?: number;
-        secret?: string;
-      }
+  export interface SrfConfig {
+    apiSecret?: string;
+    host?: string;
+    port?: number;
+    secret?: string;
+  }
 
-      export function parseUri(uri: string): { user: string; host: string; params?: Record<string, any>; };
-      export function stringifyUri(uri: object): string;
+  export function parseUri(uri: string): { user: string; host: string; params?: Record<string, any>; };
+  export function stringifyUri(uri: object): string;
 
-      export interface SipMessage {
-        type: "request" | "response";
-        body: string;
-        payload: object[];
-        source: "network" | "application";
-        source_address: string;
-        source_port: string;
-        protocol: string;
-        stackTime: string;
-        calledNumber: string;
-        callingNumber: string;
-        raw: string;
-        get(name: string): string;
-        has(name: string): boolean;
-        set(name: string, value: string);
-        getParsedHeader(name: "contact" | "Contact"): Array<AOR>;
-        getParsedHeader(name: "via" | "Via"): Array<Via>;
-        getParsedHeader(name: "To" | "to" | "From" | "from" | "refer-to" | "referred-by" | "p-asserted-identity" | "remote-party-id"): AOR;
-        getParsedHeader(name: string): string;
-      }
+  export interface SipMessage {
+    type: "request" | "response";
+    body: string;
+    payload: object[];
+    source: "network" | "application";
+    source_address: string;
+    source_port: string;
+    protocol: string;
+    stackTime: string;
+    calledNumber: string;
+    callingNumber: string;
+    raw: string;
+    get(name: string): string;
+    has(name: string): boolean;
+    set(name: string, value: string);
+    getParsedHeader(name: "contact" | "Contact"): Array<AOR>;
+    getParsedHeader(name: "via" | "Via"): Array<Via>;
+    getParsedHeader(name: "To" | "to" | "From" | "from" | "refer-to" | "referred-by" | "p-asserted-identity" | "remote-party-id"): AOR;
+    getParsedHeader(name: string): string;
+  }
 
-      export interface SrfRequest extends SipMessage {
-        method: SipMethod;
-        isNewInvite(): boolean
-        cancel(callback: () => {})
-        branch: string;
-        callId: string;
-        from: string;
-        headers: Record<string, string>;
-        msg: any;
-        sdp: string;
-        srf: any;
-        to: string;
-        uri: string;
-        registration?: {
-          type: "unregister" | "register";
-          expires: number;
-          contact: Array<AOR>;
-          aor: string;
-        };
-      }
+  export interface SrfRequest extends SipMessage {
+    method: SipMethod;
+    isNewInvite(): boolean
+    cancel(callback: () => {})
+    branch: string;
+    callId: string;
+    from: string;
+    headers: Record<string, string>;
+    msg: any;
+    sdp: string;
+    srf: any;
+    to: string;
+    uri: string;
+    registration?: {
+      type: "unregister" | "register";
+      expires: number;
+      contact: Array<AOR>;
+      aor: string;
+    };
+  }
 
-      export interface SrfResponse extends SipMessage {
-        status: number;
-        statusCode: number;
-        reason: string;
-        finalResponseSent: boolean;
-        send(status: number);
-        send(status: number, opts: object);
-        send(status: number, reason: string, opts: object);
-        send(status: number, reason: string, opts: object, callback: (err, msg) => {});
-        end();
-      }
+  export interface SrfResponse extends SipMessage {
+    status: number;
+    statusCode: number;
+    reason: string;
+    finalResponseSent: boolean;
+    send(status: number);
+    send(status: number, opts: object);
+    send(status: number, reason: string, opts: object);
+    send(status: number, reason: string, opts: object, callback: (err, msg) => {});
+    end();
+  }
 
-      export interface Dialog {
-        sip: { callId: string; localTag: string; remoteTag: string; };
-        onHold: boolean;
-        other: Dialog;
-        type: "uac" | "uas";
-        local: { uri: string; sdp: string; };
-        remote: { uri: string; sdp: string; };
-        req: SrfRequest;
-        destroy(opts?: { headers: Record<string, string>; }, callback?: (err, msg) => {}): void;
-        modify(sdp, callback?: (err: any, msg: SrfResponse) => void): void;
-        modify({ noAck: boolean }, callback?: (err: any, resp: any, resAck: any) => void): void;
-        on(messageType: "ack", callback: (msg: SrfRequest) => void): void;
-        on(messageType: "destroy", callback: (msg: SrfRequest) => void): void;
-        on(messageType: "info", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "message", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "modify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "notify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "options", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "refer", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "refresh", callback: (msg: SrfRequest) => void): void;
-        on(messageType: "update", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        on(messageType: "modify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        once(messageType: string, callback: (msg: SrfResponse) => void): void;
-        listeners(messageType: string): any[];
-        request(opts?: { method: SipMethod; headers?: Record<string, string | number>; body?: string; }, callback?: (err, msg) => {});
-      }
+  export interface Dialog {
+    sip: { callId: string; localTag: string; remoteTag: string; };
+    onHold: boolean;
+    other: Dialog;
+    type: "uac" | "uas";
+    local: { uri: string; sdp: string; };
+    remote: { uri: string; sdp: string; };
+    req: SrfRequest;
+    destroy(opts?: { headers: Record<string, string>; }, callback?: (err, msg) => {}): void;
+    modify(sdp, callback?: (err: any, msg: SrfResponse) => void): void;
+    modify({ noAck: boolean }, callback?: (err: any, resp: any, resAck: any) => void): void;
+    on(messageType: "ack", callback: (msg: SrfRequest) => void): void;
+    on(messageType: "destroy", callback: (msg: SrfRequest) => void): void;
+    on(messageType: "info", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "message", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "modify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "notify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "options", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "refer", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "refresh", callback: (msg: SrfRequest) => void): void;
+    on(messageType: "update", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    on(messageType: "modify", callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    once(messageType: string, callback: (msg: SrfResponse) => void): void;
+    listeners(messageType: string): any[];
+    request(opts?: { method: SipMethod; headers?: Record<string, string | number>; body?: string; }, callback?: (err, msg) => {});
+  }
 
-      export interface CreateUASOptions {
-        localSdp: string;
-        headers?: SipMessageHeaders;
-      }
+  export interface CreateUASOptions {
+    localSdp: string;
+    headers?: SipMessageHeaders;
+  }
 
-      export interface CreateUACOptions {
-        headers?: SipMessageHeaders;
-        uri?: string;
-        noAck?: boolean;
-        localSdp?: string;
-        proxy?: string;
-        auth?: { username: string; password: string; };
-      }
+  export interface CreateUACOptions {
+    headers?: SipMessageHeaders;
+    uri?: string;
+    noAck?: boolean;
+    localSdp?: string;
+    proxy?: string;
+    auth?: { username: string; password: string; };
+  }
 
-      export interface CreateB2BUAOptions {
-        headers?: SipMessageHeaders;
-        responseHeaders?: SipMessageHeaders | ((uacRes: SipMessageHeaders, headers: SipMessageHeaders) => SipMessageHeaders | null);
-        localSdpA?: string | ((sdp: string, res: SrfResponse) => string | Promise<string>);
-        localSdpB?: string | ((sdp: string) => string | Promise<string>);
-        proxyRequestHeaders?: string[];
-        proxyResponseHeaders?: string[];
-        passFailure?: boolean;
-        passProvisionalResponses?: boolean;
-        proxy?: string;
-        auth?: { username: string; password: string; };
-      }
+  export interface CreateB2BUAOptions {
+    headers?: SipMessageHeaders;
+    responseHeaders?: SipMessageHeaders | ((uacRes: SipMessageHeaders, headers: SipMessageHeaders) => SipMessageHeaders | null);
+    localSdpA?: string | ((sdp: string, res: SrfResponse) => string | Promise<string>);
+    localSdpB?: string | ((sdp: string) => string | Promise<string>);
+    proxyRequestHeaders?: string[];
+    proxyResponseHeaders?: string[];
+    passFailure?: boolean;
+    passProvisionalResponses?: boolean;
+    proxy?: string;
+    auth?: { username: string; password: string; };
+  }
 
-      class Srf extends EventEmitter {
-        constructor();
-        constructor(tags: string | string[]);
-        connect(config?: SrfConfig): Promise<void>;
-        disconnect(): void;
-        use(callback: (req: SrfRequest, res: SrfResponse, next: Function) => void): void;
-        use(messageType: string, callback: (req: SrfRequest, res: SrfResponse, next: Function) => void): void;
-        invite(callback: (req: SrfRequest, res: SrfResponse) => void): void;
-        request(uri: string, opts, method, [body], callback?: (err, requestSent: SrfRequest) => void);
-        proxyRequest(req: SrfRequest, destination: string | string[], [opts], callback?: (err, results) => {}): void;
-        createUAS(req: SrfRequest, res: SrfResponse, opts: CreateUASOptions, callback?: (err, dialog: Dialog) => void): Promise<Dialog>;
-        createUAC(uri: string | CreateUACOptions, opts?: CreateUACOptions, progressCallbacks?: { cbRequest?: (req: SrfRequest) => void; cbProvisional?: (provisionalRes: SrfResponse) => void; }, callback?: (err, dialog: Dialog) => void): Promise<Dialog>;
-        createB2BUA(req: SrfRequest, res: SrfResponse, uri: string, opts: CreateB2BUAOptions, progressCallbacks?: { cbRequest?: (req: SrfRequest) => void; cbProvisional?: (provisionalRes: Response) => void; cbFinalizedUac?: (uac: Dialog) => void; }, callback?: (err, dialog: Dialog) => {}): Promise<{ uas: Dialog; uac: Dialog }>;
-        on(event: 'connect', listener: (err: Error, hostPort: string) => void): this;
-        on(event: 'error', listener: (err: Error) => void): this;
-        on(event: 'disconnect', listener: () => void): this;
-        on(event: 'message', listener: (req: SrfRequest, res: SrfResponse) => void): this;
-        on(event: 'request', listener: (req: SrfRequest, res: SrfResponse) => void): this;
-        on(event: 'register' | 'invite' | 'bye' | 'cancel' | 'ack' | 'info' | 'notify' | 'options' | 'prack' | 'publish' | 'refer' | 'subscribe' | 'update', listener: (req: SrfRequest, res: SrfResponse) => void): this;
-        on(event: 'cdr:attempt', listener: (source: string, time: string, msg: SipMessage) => void): this;
-        on(event: 'cdr:start', listener: (source: string, time: string, role: string, msg: SipMessage) => void): this;
-        on(event: 'cdr:stop', listener: (source: string, time: string, reason: string, msg: SipMessage) => void): this;
-        locals: {[name: string]: any};
-        socket: Socket;
-      }
-    }
-
-    export = Srf.Srf;
+  class Srf extends EventEmitter {
+    constructor();
+    constructor(tags: string | string[]);
+    connect(config?: SrfConfig): Promise<void>;
+    disconnect(): void;
+    use(callback: (req: SrfRequest, res: SrfResponse, next: Function) => void): void;
+    use(messageType: string, callback: (req: SrfRequest, res: SrfResponse, next: Function) => void): void;
+    invite(callback: (req: SrfRequest, res: SrfResponse) => void): void;
+    request(uri: string, opts, method, [body], callback?: (err, requestSent: SrfRequest) => void);
+    proxyRequest(req: SrfRequest, destination: string | string[], [opts], callback?: (err, results) => {}): void;
+    createUAS(req: SrfRequest, res: SrfResponse, opts: CreateUASOptions, callback?: (err, dialog: Dialog) => void): Promise<Dialog>;
+    createUAC(uri: string | CreateUACOptions, opts?: CreateUACOptions, progressCallbacks?: { cbRequest?: (req: SrfRequest) => void; cbProvisional?: (provisionalRes: SrfResponse) => void; }, callback?: (err, dialog: Dialog) => void): Promise<Dialog>;
+    createB2BUA(req: SrfRequest, res: SrfResponse, uri: string, opts: CreateB2BUAOptions, progressCallbacks?: { cbRequest?: (req: SrfRequest) => void; cbProvisional?: (provisionalRes: Response) => void; cbFinalizedUac?: (uac: Dialog) => void; }, callback?: (err, dialog: Dialog) => {}): Promise<{ uas: Dialog; uac: Dialog }>;
+    on(event: 'connect', listener: (err: Error, hostPort: string) => void): this;
+    on(event: 'error', listener: (err: Error) => void): this;
+    on(event: 'disconnect', listener: () => void): this;
+    on(event: 'message', listener: (req: SrfRequest, res: SrfResponse) => void): this;
+    on(event: 'request', listener: (req: SrfRequest, res: SrfResponse) => void): this;
+    on(event: 'register' | 'invite' | 'bye' | 'cancel' | 'ack' | 'info' | 'notify' | 'options' | 'prack' | 'publish' | 'refer' | 'subscribe' | 'update', listener: (req: SrfRequest, res: SrfResponse) => void): this;
+    on(event: 'cdr:attempt', listener: (source: string, time: string, msg: SipMessage) => void): this;
+    on(event: 'cdr:start', listener: (source: string, time: string, role: string, msg: SipMessage) => void): this;
+    on(event: 'cdr:stop', listener: (source: string, time: string, reason: string, msg: SipMessage) => void): this;
+    locals: { [name: string]: any };
+    socket: Socket;
+  }
 }
+
+export = Srf.Srf;