diff --git a/code/K9Crush-scaffold/K9Crush/Directory.Packages.props b/code/K9Crush-scaffold/K9Crush/Directory.Packages.props
index 5f9164c..29cdbc0 100644
--- a/code/K9Crush-scaffold/K9Crush/Directory.Packages.props
+++ b/code/K9Crush-scaffold/K9Crush/Directory.Packages.props
@@ -92,7 +92,7 @@
     <PackageVersion Include="FluentAssertions" Version="6.12.1" />                      <!-- [good-faith] -->
     <PackageVersion Include="NSubstitute" Version="5.3.0" />                            <!-- [verified] mocking library - none was pinned yet; NSubstitute chosen over Moq for its no-Expression-tree call syntax, pairs well with async Marten interfaces (IDocumentSession/IQuerySession) -->
     <PackageVersion Include="NetArchTest.Rules" Version="1.3.2" />                      <!-- [good-faith] -->
-    <PackageVersion Include="Testcontainers.PostgreSql" Version="3.10.0" />             <!-- [good-faith] -->
+    <PackageVersion Include="Testcontainers.PostgreSql" Version="4.13.0" />             <!-- [good-faith] -->
     <PackageVersion Include="Testcontainers.RabbitMq" Version="3.10.0" />               <!-- [good-faith] -->
     <PackageVersion Include="Testcontainers.Redis" Version="3.10.0" />                  <!-- [good-faith] -->
     <PackageVersion Include="coverlet.collector" Version="10.0.1" />                    <!-- [verified against nuget.org's flat-container API directly] - CI code coverage collection, see tests/Directory.Build.props -->