diff --git a/00.ForBeginners/08-multi-agent/code_samples/dotnet-agent-framework-ghmodel-workflow-multi-agents/dotnet-agent-framework-ghmodel-workflow-multi-agents.csproj b/00.ForBeginners/08-multi-agent/code_samples/dotnet-agent-framework-ghmodel-workflow-multi-agents/dotnet-agent-framework-ghmodel-workflow-multi-agents.csproj
index 05afe86..4120cc8 100644
--- a/00.ForBeginners/08-multi-agent/code_samples/dotnet-agent-framework-ghmodel-workflow-multi-agents/dotnet-agent-framework-ghmodel-workflow-multi-agents.csproj
+++ b/00.ForBeginners/08-multi-agent/code_samples/dotnet-agent-framework-ghmodel-workflow-multi-agents/dotnet-agent-framework-ghmodel-workflow-multi-agents.csproj
@@ -17,7 +17,7 @@
     <PackageReference Include="Azure.Identity" Version="1.20.0" />
     <PackageReference Include="System.Linq.Async" Version="7.0.0" />
     <PackageReference Include="OpenAI" Version="2.9.1" />
-    <PackageReference Include="OpenTelemetry.Api" Version="1.14.0" />
+    <PackageReference Include="OpenTelemetry.Api" Version="1.15.3" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="Your_Microsoft.Agents.AI.Workflows_Project_Path" />