diff --git a/.gitignore b/.gitignore
index 9303c34..f8deb35 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
-npm-debug.log
\ No newline at end of file
+npm-debug.log
+dist/
\ No newline at end of file
diff --git a/src/client.ts b/src/client.ts
index 627eb9d..900eb65 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -9,7 +9,7 @@ import { TunnelRequest, TunnelResponse } from "./lib";
 import { generateUUID, addPrefixOnHttpSchema } from "./util";
 import { Socket } from 'socket.io-client';
 
-const sdk = require("../sdk");
+import { getTokenFree } from './sdk'
 
 const packageInfo = require("../package.json");
 
@@ -276,9 +276,8 @@ program
 
     if (!config.token) {
       console.log("Generating token...");
-      await sdk
-        .getTokenFree(config.server)
-        .then((resp) => {
+      await getTokenFree(config.server)
+        .then((resp: any) => {
           if (resp.data?.token) {
             config.token = resp.data?.token;
           } else {
@@ -286,7 +285,7 @@ program
             return;
           }
         })
-        .catch((err) => {
+        .catch((err: any) => {
           console.error("cannot get free token from server", err);
           return;
         });
@@ -430,9 +429,8 @@ program
 
       // FREE
       if (config.access === TOKEN_FREE) {
-        await sdk
-          .getTokenFree(config.server)
-          .then((resp) => {
+        await getTokenFree(config.server)
+          .then((resp: any) => {
             if (resp.data?.token) {
               config.token = resp.data?.token;
             } else {
@@ -440,7 +438,7 @@ program
               return;
             }
           })
-          .catch((err) => {
+          .catch((err: any) => {
             console.error("cannot get free token from server", err);
             return;
           });
diff --git a/src/sdk.ts b/src/sdk.ts
index a7cad0b..a974a3f 100644
--- a/src/sdk.ts
+++ b/src/sdk.ts
@@ -1,6 +1,6 @@
 const axios = require("axios").default;
 
-const getTokenFree = async (baseUrl, data = {}) => {
+const getTokenFree = async (baseUrl: string, data: any = {}) => {
   const url = `${baseUrl}/__free__/api/get_token`;
   return axios({
     method: "POST",
@@ -14,6 +14,6 @@ const getTokenFree = async (baseUrl, data = {}) => {
   });
 };
 
-module.exports = {
+export {
   getTokenFree,
 };