diff --git a/csharp/Directory.Packages.props b/csharp/Directory.Packages.props
index 3d4ad6cb8c..eb6c37e365 100644
--- a/csharp/Directory.Packages.props
+++ b/csharp/Directory.Packages.props
@@ -45,7 +45,7 @@
     <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="9.0.6" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="System.Net.Http.WinHttpHandler" Version="8.0.2" />
-    <PackageVersion Include="System.Text.Json" Version="9.0.9" />
+    <PackageVersion Include="System.Text.Json" Version="9.0.18" />
     <PackageVersion Include="System.Threading.Channels" Version="9.0.8" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio"