diff --git a/samples/Sample.Kafka.MySql/Sample.Kafka.MySql.csproj b/samples/Sample.Kafka.MySql/Sample.Kafka.MySql.csproj
index 88c0c1d..bf80ce5 100644
--- a/samples/Sample.Kafka.MySql/Sample.Kafka.MySql.csproj
+++ b/samples/Sample.Kafka.MySql/Sample.Kafka.MySql.csproj
@@ -9,9 +9,8 @@
  
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.6" />
-    <PackageReference Include="MySqlConnector" Version="0.38.0" />
+    <PackageReference Include="MySqlConnector" Version="0.40.3" />
     <PackageReference Include="NLog.Web.AspNetCore" Version="4.5.2" />
-    <PackageReference Include="zipkin4net" Version="1.2.0" />
   </ItemGroup>
   <ItemGroup>
     <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
diff --git a/samples/Sample.Kafka.MySql/Startup.cs b/samples/Sample.Kafka.MySql/Startup.cs
index 419e48e..59c4636 100644
--- a/samples/Sample.Kafka.MySql/Startup.cs
+++ b/samples/Sample.Kafka.MySql/Startup.cs
@@ -10,8 +10,8 @@ namespace Sample.Kafka.MySql
         {
             services.AddCap(x =>
             {
-                x.UseMySql("Server=192.168.10.110;Database=testcap;UserId=root;Password=123123;");
-                x.UseKafka("192.168.10.110:9092");
+                x.UseMySql("Server=localhost;Database=testcap;UserId=root;Password=123123;");
+                x.UseKafka("localhost:9092");
                 x.UseDashboard();
             });
 
diff --git a/samples/Sample.RabbitMQ.MySql/AppDbContext.cs b/samples/Sample.RabbitMQ.MySql/AppDbContext.cs
index ec83423..d960a8f 100644
--- a/samples/Sample.RabbitMQ.MySql/AppDbContext.cs
+++ b/samples/Sample.RabbitMQ.MySql/AppDbContext.cs
@@ -6,7 +6,7 @@ namespace Sample.RabbitMQ.MySql
     {
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
-            optionsBuilder.UseMySql("Server=192.168.10.110;Database=testcap;UserId=root;Password=123123;");
+            optionsBuilder.UseMySql("Server=localhost;Database=testcap;UserId=root;Password=123123;");
         }
     }
 }