diff --git a/.travis.yml b/.travis.yml
index 8b252f2a..8f0f5549 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 dist: focal
 language: node_js
 node_js:
-  - 19.6.0
+  - 19.7.0
 
 
 notifications:
diff --git a/boot.mjs b/boot.mjs
index 5d5c7e38..64130510 100644
--- a/boot.mjs
+++ b/boot.mjs
@@ -6,23 +6,25 @@ import { exec } from 'child_process';
 import pjson from './package.json' assert { type: 'json' };
 
 // Displays version of Node JS being used at runtime and others attributes.
-
-
 console.log(``);
 console.log(``);
-console.log(` ██████  ███████ ███    ██ ███████ ██████   █████  ██       ██████   ██████  ████████ ███████ ®  `);
-console.log(`██       ██      ████   ██ ██      ██   ██ ██   ██ ██       ██   ██ ██    ██    ██    ██         `);
-console.log(`██   ███ █████   ██ ██  ██ █████   ██████  ███████ ██       ██████  ██    ██    ██    ███████    `);
-console.log(`██    ██ ██      ██  ██ ██ ██      ██   ██ ██   ██ ██       ██   ██ ██    ██    ██         ██    `);
-console.log(` ██████  ███████ ██   ████ ███████ ██   ██ ██   ██ ██████   ██████   ██████     ██    ███████ 3.0`);
-console.log(`botserver@${pjson.version}, botlib@${pjson.dependencies.botlib}, botbuilder@${pjson.dependencies.botbuilder}, node@${process.version}, ${process.platform}(${process.arch}).`);
+console.log(` █████  █████ ██    █ █████ █████   ████  ██      ████   █████ █████  ███ ®  `);
+console.log(`██      █     ███   █ █     ██  ██ ██  ██ ██      ██  █ ██   ██  █   █       `);
+console.log(`██  ███ ████  █ ██  █ ████  █████  ██████ ██      ████   █   █   █    ██     `);
+console.log(`██   ██ █     █  ██ █ █     ██  ██ ██  ██ ██      ██  █ ██   ██  █      █    `);
+console.log(` █████  █████ █   ███ █████ ██  ██ ██  ██ ██████  ████   █████   █   ███  3.0`);
+console.log(`   botserver@${pjson.version}, botlib@${pjson.dependencies.botlib}, botbuilder@${pjson.dependencies.botbuilder}, node@${process.version.replace('v', '')}, ${process.platform} ${process.arch}`);
+
 var now = () => {
   return new Date().toISOString().replace(/T/, ' ').replace(/\..+/, '') + ' UTC';
 };
 var __dirname = process.env.PWD || process.cwd();
 try {
   var run = () => {
-    import('./dist/src/app.js').then((gb)=> gb.GBServer.run());
+    import('./dist/src/app.js').then((gb)=> {
+      console.log(``);
+      gb.GBServer.run()
+    });
   };
   var processDist = () => {
     if (!Fs.existsSync('dist')) {
diff --git a/package.json b/package.json
index fad430d2..c2142bce 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "Dário Vieira <dario.junior3@gmail.com>"
   ],
   "engines": {
-    "node": "=19.6.0"
+    "node": "=19.7.0"
   },
   "license": "AGPL-3.0",
   "preferGlobal": true,
diff --git a/packages/core.gbapp/services/GBDeployer.ts b/packages/core.gbapp/services/GBDeployer.ts
index 5209c31c..aa0a882e 100644
--- a/packages/core.gbapp/services/GBDeployer.ts
+++ b/packages/core.gbapp/services/GBDeployer.ts
@@ -57,6 +57,7 @@ import { GBConfigService } from './GBConfigService.js';
 import { GBImporter } from './GBImporterService.js';
 import { TeamsService } from '../../teams.gblib/services/TeamsService.js';
 import MicrosoftGraph from '@microsoft/microsoft-graph-client';
+import { GBLogEx } from './GBLogEx.js';
 
 /**
  * Deployer service for bots, themes, ai and more.
@@ -655,8 +656,8 @@ export class GBDeployer implements IGBDeployer {
         break;
 
       default:
-          throw GBError.create(`Unhandled package type: ${packageType}.`);
-}
+        throw GBError.create(`Unhandled package type: ${packageType}.`);
+    }
   }
 
   /**
@@ -712,38 +713,45 @@ export class GBDeployer implements IGBDeployer {
    */
   public async rebuildIndex(instance: IGBInstance, searchSchema: any) {
     // Prepares search.
-
-
-    const search = new AzureSearch(
-      instance.searchKey,
-      instance.searchHost,
-      instance.searchIndex,
-      instance.searchIndexer
-    );
-    const connectionString = GBDeployer.getConnectionStringFromInstance(instance);
-    const dsName = 'gb';
+    let release;
     try {
-      await search.createDataSource(dsName, dsName, 'GuaribasQuestion', 'azuresql', connectionString);
-    } catch (err) {
-      GBLog.error(err);
+      GBLogEx.info(instance.instanceId, `Acquiring rebuildIndex mutex...`);
+      release = await GBServer.globals.indexSemaphore.acquire();
 
-    }
+      const search = new AzureSearch(
+        instance.searchKey,
+        instance.searchHost,
+        instance.searchIndex,
+        instance.searchIndexer
+      );
+      const connectionString = GBDeployer.getConnectionStringFromInstance(instance);
+      const dsName = 'gb';
+      try {
+        await search.createDataSource(dsName, dsName, 'GuaribasQuestion', 'azuresql', connectionString);
+      } catch (err) {
+        GBLog.error(err);
+      }
 
-    // Removes the index.
+      // Removes the index.
 
-    try {
-      await search.createIndex(searchSchema, dsName);
-    } catch (err) {
-      // If it is a 404 there is nothing to delete as it is the first creation.
+      try {
+        await search.createIndex(searchSchema, dsName);
+      } catch (err) {
+        // If it is a 404 there is nothing to delete as it is the first creation.
 
-      if (err.code !== 404 && err.code !== 'OperationNotAllowed') {
+        if (err.code !== 404 && err.code !== 'OperationNotAllowed') {
+        }
+      }
 
+      GBLogEx.info(instance.instanceId, `Acquire rebuildIndex done.`);
+      await search.rebuildIndex(instance.searchIndexer);
+      release();
+      GBLogEx.info(instance.instanceId, `Released rebuildIndex mutex.`);
+    } catch {
+      if (release) {
+        release();
       }
     }
-
-
-    await search.rebuildIndex(instance.searchIndexer);
-
   }
 
   /**
diff --git a/src/RootData.ts b/src/RootData.ts
index 68794993..abecfa3b 100644
--- a/src/RootData.ts
+++ b/src/RootData.ts
@@ -59,4 +59,5 @@ export class RootData {
   public debugConversationId: any; // Used to self-message during debug.
   public debuggers: any[]; // Client of attached Debugger instances by botId.
   public chatGPT: any; // ChatGPT API handle (shared Browser).
+  indexSemaphore: any;
 }
diff --git a/src/app.ts b/src/app.ts
index ad139aa5..89b716fb 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -56,6 +56,7 @@ import child_process from 'child_process';
 import * as winston from 'winston-logs-display';
 import { RootData } from './RootData.js';
 import { GBSSR } from '../packages/core.gbapp/services/GBSSR.js';
+import { Mutex } from 'async-mutex';
 
 /**
  * General Bots open-core entry point.
@@ -95,6 +96,8 @@ export class GBServer {
     GBServer.globals.wwwroot = null;
     GBServer.globals.entryPointDialog = null;
     GBServer.globals.debuggers = [];
+    GBServer.globals.indexSemaphore = new Mutex();
+
 
     server.use(bodyParser.json());
     server.use(bodyParser.urlencoded({ extended: true }));