diff --git a/Directory.Build.props b/Directory.Build.props
index 4233fb32..6716a3c7 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,7 +2,7 @@
     <PropertyGroup>
         <TargetFramework>net8.0</TargetFramework>
         <LangVersion>12.0</LangVersion>
-        <BotSharpVersion>3.0.0</BotSharpVersion>
+        <BotSharpVersion>4.0.0</BotSharpVersion>
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
         <GenerateDocumentationFile>false</GenerateDocumentationFile>
     </PropertyGroup>
diff --git a/README.md b/README.md
index e5c3684a..9fd42e2a 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ It's written in C# running on .Net Core that is full cross-platform framework, t
 * Built-in multi-agents and conversation with state management.
 * Support multiple LLM Planning approaches to handle different tasks from simple to complex.
 * Built-in RAG related interfaces, Memory based vector searching.
-* Support multiple AI platforms (ChatGPT 3.5 / 4.0, PaLM 2, LLaMA 3, Claude Sonnet 3.5, HuggingFace).
+* Support multiple AI platforms (ChatGPT 3.5/ 4o/ o1, Gemini 2, LLaMA 3, Claude Sonnet 3.5, HuggingFace).
 * Allow multiple agents with different responsibilities cooperate to complete complex tasks. 
 * Build, test, evaluate and audit your LLM agent in one place.
 * Build-in `BotSharp UI` written in [SvelteKit](https://kit.svelte.dev/).
diff --git a/src/Infrastructure/BotSharp.Core/BotSharpCoreExtensions.cs b/src/Infrastructure/BotSharp.Core/BotSharpCoreExtensions.cs
index af8a9324..f588b4d1 100644
--- a/src/Infrastructure/BotSharp.Core/BotSharpCoreExtensions.cs
+++ b/src/Infrastructure/BotSharp.Core/BotSharpCoreExtensions.cs
@@ -105,6 +105,11 @@ public static class BotSharpCoreExtensions
         var dbSettings = new BotSharpDatabaseSettings();
         config.Bind("Database", dbSettings);
 
+        if (string.IsNullOrEmpty(dbSettings.Redis))
+        {
+            return;
+        }
+
         services.AddSingleton<IConnectionMultiplexer>(ConnectionMultiplexer.Connect(dbSettings.Redis));
         services.AddSingleton<IEventPublisher, RedisPublisher>();
         services.AddSingleton<IEventSubscriber, RedisSubscriber>();
diff --git a/src/Infrastructure/BotSharp.Core/Infrastructures/DistributedLocker.cs b/src/Infrastructure/BotSharp.Core/Infrastructures/DistributedLocker.cs
index 48ff193f..c87dbe45 100644
--- a/src/Infrastructure/BotSharp.Core/Infrastructures/DistributedLocker.cs
+++ b/src/Infrastructure/BotSharp.Core/Infrastructures/DistributedLocker.cs
@@ -6,12 +6,12 @@ namespace BotSharp.Core.Infrastructures;
 
 public class DistributedLocker : IDistributedLocker
 {
-    private readonly IConnectionMultiplexer _redis;
+    private readonly IServiceProvider _services;
     private readonly ILogger _logger;
 
-    public DistributedLocker(IConnectionMultiplexer redis, ILogger<DistributedLocker> logger)
+    public DistributedLocker(IServiceProvider services, ILogger<DistributedLocker> logger)
     {
-        _redis = redis;
+        _services = services;
         _logger = logger;
     }
 
@@ -19,7 +19,8 @@ public class DistributedLocker : IDistributedLocker
     {
         var timeout = TimeSpan.FromSeconds(timeoutInSeconds);
 
-        var @lock = new RedisDistributedLock(resource, _redis.GetDatabase());
+        var redis = _services.GetRequiredService<IConnectionMultiplexer>();
+        var @lock = new RedisDistributedLock(resource, redis.GetDatabase());
         await using (var handle = await @lock.TryAcquireAsync(timeout))
         {
             if (handle == null) 
@@ -37,7 +38,8 @@ public class DistributedLocker : IDistributedLocker
     {
         var timeout = TimeSpan.FromSeconds(timeoutInSeconds);
 
-        var @lock = new RedisDistributedLock(resource, _redis.GetDatabase());
+        var redis = _services.GetRequiredService<IConnectionMultiplexer>();
+        var @lock = new RedisDistributedLock(resource, redis.GetDatabase());
         using (var handle = @lock.TryAcquire(timeout))
         {
             if (handle == null)