diff --git a/holo-key-manager-js-client/.npmignore b/holo-key-manager-js-client/.npmignore
index 217ccfb..fac3fe7 100644
--- a/holo-key-manager-js-client/.npmignore
+++ b/holo-key-manager-js-client/.npmignore
@@ -3,4 +3,6 @@ node_modules/
 src/
 types/
 prebuild.cjs
-index.ts
\ No newline at end of file
+index.ts
+*.tgz
+
diff --git a/holo-key-manager-js-client/prebuild.cjs b/holo-key-manager-js-client/prebuild.cjs
index d0068c1..3f40d61 100644
--- a/holo-key-manager-js-client/prebuild.cjs
+++ b/holo-key-manager-js-client/prebuild.cjs
@@ -5,7 +5,7 @@ require('dotenv').config({ path: '../.env' });
 const fs = require('fs');
 const path = require('path');
 
-const configContent = `
+const generateConfigContent = () => `
 export const browserConfig = {
     ChromeID: '${process.env.CHROME_ID}',
     FirefoxID: '${process.env.FF_ID}',
@@ -14,4 +14,15 @@ export const browserConfig = {
 `;
 
 const configFile = path.resolve(__dirname, 'src', 'browserConfig.ts');
-fs.writeFileSync(configFile, configContent, 'utf8');
+
+const writeConfigFile = (filePath, content) => {
+	if (fs.existsSync(filePath)) {
+		console.log('browserConfig exists, overriding...');
+	}
+	fs.writeFile(filePath, content, 'utf8', (err) => {
+		if (err) throw err;
+		console.log('browserConfig.ts has been saved!');
+	});
+};
+
+writeConfigFile(configFile, generateConfigContent());