diff --git a/Sources/Directory.Packages.props b/Sources/Directory.Packages.props
index f6b3c04d..67c615f1 100644
--- a/Sources/Directory.Packages.props
+++ b/Sources/Directory.Packages.props
@@ -26,7 +26,7 @@
     <PackageVersion Include="NSwag.AspNetCore" Version="14.7.1" />
     <PackageVersion Include="NUnit" Version="4.6.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
-    <PackageVersion Include="protobuf-net" Version="3.2.56" />
+    <PackageVersion Include="protobuf-net" Version="3.4.19" />
     <PackageVersion Include="Shouldly" Version="4.3.0" />
     <PackageVersion Include="StyleCop.Analyzers.Unstable" Version="1.2.0.556" />
     <PackageVersion Include="Swashbuckle.AspNetCore.Annotations" Version="10.2.3" />