diff --git a/.env.example b/.env.example
index 8916869..8710b2c 100644
--- a/.env.example
+++ b/.env.example
@@ -16,6 +16,7 @@ WEB_VERSION_CACHE_TYPE=none # OPTIONAL, DETERMINTES WHERE TO GET THE WHATSAPP WE
 RECOVER_SESSIONS=TRUE # OPTIONAL, SHOULD WE RECOVER THE SESSION IN CASE OF PAGE FAILURES
 CHROME_BIN= # OPTIONAL, PATH TO CHROME BINARY
 HEADLESS=TRUE # OPTIONAL, RUN CHROME IN HEADLESS MODE
+RELEASE_BROWSER_LOCK=TRUE # OPTIONAL, RELEASE THE BROWSER LOCK ON SESSION INITIALIZATION
 
 ## Session File Storage ##
 SESSIONS_PATH=./sessions # OPTIONAL
diff --git a/src/config.js b/src/config.js
index 5032fc0..1e03954 100644
--- a/src/config.js
+++ b/src/config.js
@@ -17,6 +17,7 @@ const rateLimitWindowMs = parseInt(process.env.RATE_LIMIT_WINDOW_MS) || 1000
 const recoverSessions = (process.env.RECOVER_SESSIONS || '').toLowerCase() === 'true'
 const chromeBin = process.env.CHROME_BIN || null
 const headless = process.env.HEADLESS ? (process.env.HEADLESS).toLowerCase() === 'true' : true
+const releaseBrowserLock = process.env.RELEASE_BROWSER_LOCK ? (process.env.RELEASE_BROWSER_LOCK).toLowerCase() === 'true' : true
 
 module.exports = {
   sessionFolderPath,
@@ -33,5 +34,6 @@ module.exports = {
   rateLimitWindowMs,
   recoverSessions,
   chromeBin,
-  headless
+  headless,
+  releaseBrowserLock
 }
diff --git a/src/controllers/healthController.js b/src/controllers/healthController.js
index 6aa2f28..300b97f 100644
--- a/src/controllers/healthController.js
+++ b/src/controllers/healthController.js
@@ -43,11 +43,11 @@ const localCallbackExample = async (req, res) => {
   try {
     const { dataType, data } = req.body
     if (dataType === 'qr') { qrcode.generate(data.qr, { small: true }) }
-    await fsp.writeFile(`${sessionFolderPath}/message_log.txt`, `${JSON.stringify(req.body)}\r\n`, { flag: 'a+' }, _ => _)
+    await fsp.mkdir(sessionFolderPath, { recursive: true })
+    await fsp.writeFile(`${sessionFolderPath}/message_log.txt`, `${JSON.stringify(req.body)}\r\n`, { flag: 'a+' })
     res.json({ success: true })
   } catch (error) {
     console.log(error)
-    await fsp.writeFile(`${sessionFolderPath}/message_log.txt`, `(ERROR) ${JSON.stringify(error)}\r\n`, { flag: 'a+' }, _ => _)
     sendErrorResponse(res, 500, error.message)
   }
 }
diff --git a/src/controllers/sessionController.js b/src/controllers/sessionController.js
index d8bd886..8a5ef66 100644
--- a/src/controllers/sessionController.js
+++ b/src/controllers/sessionController.js
@@ -18,7 +18,7 @@ const startSession = async (req, res) => {
   // #swagger.description = 'Starts a session for the given session ID.'
   try {
     const sessionId = req.params.sessionId
-    const setupSessionReturn = setupSession(sessionId)
+    const setupSessionReturn = await setupSession(sessionId)
     if (!setupSessionReturn.success) {
       /* #swagger.responses[422] = {
         description: "Unprocessable Entity.",
diff --git a/src/sessions.js b/src/sessions.js
index 2278b4d..1b9d4a7 100644
--- a/src/sessions.js
+++ b/src/sessions.js
@@ -2,7 +2,7 @@ const { Client, LocalAuth } = require('whatsapp-web.js')
 const fs = require('fs')
 const path = require('path')
 const sessions = new Map()
-const { baseWebhookURL, sessionFolderPath, maxAttachmentSize, setMessagesAsSeen, webVersion, webVersionCacheType, recoverSessions, chromeBin, headless } = require('./config')
+const { baseWebhookURL, sessionFolderPath, maxAttachmentSize, setMessagesAsSeen, webVersion, webVersionCacheType, recoverSessions, chromeBin, headless, releaseBrowserLock } = require('./config')
 const { triggerWebhook, waitForNestedObject, checkIfEventisEnabled } = require('./utils')
 
 // Function to validate if the session is ready
@@ -65,7 +65,7 @@ const restoreSessions = () => {
       fs.mkdirSync(sessionFolderPath) // Create the session directory if it doesn't exist
     }
     // Read the contents of the folder
-    fs.readdir(sessionFolderPath, (_, files) => {
+    fs.readdir(sessionFolderPath, async (_, files) => {
       // Iterate through the files in the parent folder
       for (const file of files) {
         // Use regular expression to extract the string from the folder name
@@ -73,7 +73,7 @@ const restoreSessions = () => {
         if (match) {
           const sessionId = match[1]
           console.log('existing session detected', sessionId)
-          setupSession(sessionId)
+          await setupSession(sessionId)
         }
       }
     })
@@ -84,7 +84,7 @@ const restoreSessions = () => {
 }
 
 // Setup Session
-const setupSession = (sessionId) => {
+const setupSession = async (sessionId) => {
   try {
     if (sessions.has(sessionId)) {
       return { success: false, message: `Session already exists for: ${sessionId}`, client: sessions.get(sessionId) }
@@ -127,7 +127,22 @@ const setupSession = (sessionId) => {
 
     const client = new Client(clientOptions)
 
-    client.initialize().catch(err => console.log('Initialize error:', err.message))
+    if (releaseBrowserLock) {
+      // See https://github.com/puppeteer/puppeteer/issues/4860
+      const singletonLockPath = path.join(`${sessionFolderPath}-${sessionId}`, 'SingletonLock')
+      const singletonLockExists = await fs.promises.access(singletonLockPath).then(() => true).catch(() => false)
+      if (singletonLockExists) {
+        console.log('Browser lock file exists, removing ', sessionId)
+        await fs.promises.unlink(singletonLockPath)
+      }
+    }
+
+    try {
+      await client.initialize()
+    } catch (error) {
+      console.log('Initialize error:', error.message)
+      throw error
+    }
 
     initializeEvents(client, sessionId)
 
@@ -148,7 +163,7 @@ const initializeEvents = (client, sessionId) => {
       const restartSession = async (sessionId) => {
         sessions.delete(sessionId)
         await client.destroy().catch(e => { })
-        setupSession(sessionId)
+        await setupSession(sessionId)
       }
       client.pupPage.once('close', function () {
         // emitted when the page closes
@@ -402,7 +417,7 @@ const reloadSession = async (sessionId) => {
       }
     }
     sessions.delete(sessionId)
-    setupSession(sessionId)
+    await setupSession(sessionId)
   } catch (error) {
     console.log(error)
     throw error