diff --git a/README.md b/README.md
index 6870444..196ca47 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,7 @@
 
 Check Youtube👇
 
-[![](http://img.youtube.com/vi/s_MvkH3IXrM/0.jpg)](http://www.youtube.com/watch?v=s_MvkH3IXrM "")
-
+[![youtube](http://img.youtube.com/vi/s_MvkH3IXrM/0.jpg)](http://www.youtube.com/watch?v=s_MvkH3IXrM "")
 
 ## Installation
 
@@ -18,20 +17,16 @@ git clone https://github.com/okhiroyuki/redmobile-modules-generator.git
 
 ## Usage
 
-First, do `npm i`.
-
-Next, Install the Node-RED Custom Node you want to use with the npm command.
-
-Sample:
-
-```bash
-// Add any module
-npm i node-red-contrib-telegrambot
-```
+1. `npm i`
+1. Install the Node-RED Custom Node you want to use with the npm command.
 
-Finally, do `npm run build`.
+    ```bash
+    // sample
+    npm i node-red-contrib-telegrambot
+    ```
 
-The `node_modules.zip` file will be generated directly under the dist folder.
+1. `npm run build`
+1. The `node_modules.zip` file will be generated directly under the dist folder.
 
 ## How to apply it to Redmobile
 
diff --git a/main.js b/main.js
index a4b7cb8..3016845 100644
--- a/main.js
+++ b/main.js
@@ -1,11 +1,10 @@
 const fs = require('fs');
 const archiver = require('archiver');
-const childProcess = require('child_process');
 const modclean = require('modclean');
 
 const distDir = 'dist';
 const targetDir = 'node_modules';
-const distPath = 'dist/node_modules.zip';
+const distPath = `${distDir}/${targetDir}.zip`;
 
 const zipArchive = async () => {
     const zipPath = `${targetDir}.zip`;
@@ -31,25 +30,6 @@ const zipArchive = async () => {
     await archive.finalize();
 }
 
-const runNpm = (cmd, args) => {
-    return new Promise((resolve) => {
-        let n = childProcess.spawn(cmd,args);
-        n.stdout.setEncoding('utf-8');
-        n.stdout.on('data', (data) => {
-            console.log(`${data}`);
-        });
-
-        n.stderr.on('data', (data) => {
-            console.error(`${data}`);
-        });
-
-        n.on('close', (code) => {
-            console.log(`child process exited with code ${code}`);
-            resolve();
-        });
-    });
-}
-
 const clearDir = (dir) => {
     if (fs.existsSync(dir)) {
         fs.rmSync(dir, { recursive: true, force: true });
@@ -59,17 +39,11 @@ const clearDir = (dir) => {
 (async() => {
     clearDir(distDir);
     fs.mkdirSync(distDir);
-    if( fs.existsSync( 'package-lock.json' ) ){
-        fs.unlinkSync('package-lock.json');
-        try {
-            await runNpm('npm',['i','--omit=dev']);
-            let mc = modclean({ignorePatterns:['example*', 'examples']});
-            mc.clean();
-            await zipArchive();
-        }catch(e){
-            console.error(e.stack);
-        }
-    }else{
-        console.log('Start with the first step (npm i)');
+    try {
+        let mc = modclean({ignorePatterns:['example*', 'examples']});
+        mc.clean();
+        await zipArchive();
+    }catch(e){
+        console.error(e.stack);
     }
 })();