diff --git a/LGSTrayPrimitives/LGSTrayPrimitives.csproj b/LGSTrayPrimitives/LGSTrayPrimitives.csproj
index 01b6a5a..9e35bc1 100644
--- a/LGSTrayPrimitives/LGSTrayPrimitives.csproj
+++ b/LGSTrayPrimitives/LGSTrayPrimitives.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MessagePack" Version="2.5.129" />
+    <PackageReference Include="MessagePack" Version="2.5.187" />
     <PackageReference Include="MessagePipe.Interprocess" Version="1.7.4" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.0" />
   </ItemGroup>