diff --git a/AcsEmailMcp.csproj b/AcsEmailMcp.csproj
index e6dc3e2..ed9b1c7 100644
--- a/AcsEmailMcp.csproj
+++ b/AcsEmailMcp.csproj
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.3.0-preview.1" />
+        <PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.3.0-preview.4" />
         <PackageReference Include="Azure.Communication.Email" Version="1.0.2" />
         <PackageReference Include="Azure.Identity" Version="1.16.0" />
         <PackageReference Include="Serilog.AspNetCore" Version="8.0.0" />