diff --git a/Directory.Build.props b/Directory.Build.props
index 8f9a2ff..5faa45e 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -22,7 +22,7 @@
 		<XunitVersion>2.9.2</XunitVersion>
 		<XunitRunnerVisualStudioVersion>2.8.2</XunitRunnerVisualStudioVersion>
 		<MoqVersion>4.20.72</MoqVersion>
-    <TestableIOSystemIOAbstractionsTestingHelpersVersion>21.1.3</TestableIOSystemIOAbstractionsTestingHelpersVersion>
+    <TestableIOSystemIOAbstractionsTestingHelpersVersion>21.2.1</TestableIOSystemIOAbstractionsTestingHelpersVersion>
     <CoverletCollector>3.2.0</CoverletCollector>
 	</PropertyGroup>
 </Project>
\ No newline at end of file