diff --git a/Directory.Packages.props b/Directory.Packages.props
index 4967a4e..f5bdb77 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -13,7 +13,7 @@
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
     <!-- 3.3.0+ ships the .proto source generator inside protobuf-net.Core; the standalone
          protobuf-net.BuildTools package is redundant and loading both duplicates the generator. -->
-    <PackageVersion Include="protobuf-net" Version="3.4.30" />
+    <PackageVersion Include="protobuf-net" Version="3.4.40" />
     <PackageVersion Include="System.Text.Json" Version="10.0.13" />
     <!-- netstandard2.0: Channels is in-box on net10.0; ns2.0 needs the package. -->
     <PackageVersion Include="System.Threading.Channels" Version="10.0.13" />