diff --git a/src/McpServer/CodeMeridian.McpServer.csproj b/src/McpServer/CodeMeridian.McpServer.csproj
index d95bba72..edb7c35a 100644
--- a/src/McpServer/CodeMeridian.McpServer.csproj
+++ b/src/McpServer/CodeMeridian.McpServer.csproj
@@ -20,7 +20,7 @@
     <PackageReference Include="HotChocolate.AspNetCore" Version="16.*" />
     <PackageReference Include="HotChocolate.AspNetCore.Authorization" Version="16.*" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.*" />
-    <PackageReference Include="Microsoft.OpenApi" Version="2.10.0" />
+    <PackageReference Include="Microsoft.OpenApi" Version="3.8.0" />
     <PackageReference Include="ModelContextProtocol.AspNetCore" Version="1.*" />
     <PackageReference Include="Swashbuckle.AspNetCore.SwaggerUI" Version="10.*" />
   </ItemGroup>