diff --git a/src/SharpCoreDB.AppHost/SharpCoreDB.AppHost.csproj b/src/SharpCoreDB.AppHost/SharpCoreDB.AppHost.csproj
index 41356b2e..4fcd6818 100644
--- a/src/SharpCoreDB.AppHost/SharpCoreDB.AppHost.csproj
+++ b/src/SharpCoreDB.AppHost/SharpCoreDB.AppHost.csproj
@@ -26,7 +26,7 @@
     <!-- Orchestration and Dashboard SDK are automatically provided by Aspire SDK, removed explicit references to fix NU1504 -->
     <PackageReference Include="KubernetesClient" Version="19.0.2" />
     <!-- Explicit override for vulnerable transitive MessagePack brought by KubernetesClient + Aspire/StreamJsonRpc (>=2.5.302 required) -->
-    <PackageReference Include="MessagePack" Version="3.1.11" />
+    <PackageReference Include="MessagePack" Version="3.1.12" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.401">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>