diff --git a/Directory.Build.props b/Directory.Build.props
index 5faa45e..733f012 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -7,7 +7,7 @@
 		<MicrosoftExtensionsHostingVersion>8.0.1</MicrosoftExtensionsHostingVersion>
 		<MicrosoftExtensionsConfigurationVersion>8.0.0</MicrosoftExtensionsConfigurationVersion>
 		<SystemCommandLineHostingVersion>0.3.0-alpha.21216.1</SystemCommandLineHostingVersion>
-    <TestableIOSystemIOAbstractionsWrappersVersion>21.0.29</TestableIOSystemIOAbstractionsWrappersVersion>
+    <TestableIOSystemIOAbstractionsWrappersVersion>21.2.1</TestableIOSystemIOAbstractionsWrappersVersion>
 		<MicrosoftCodeAnalysisCSharpVersion>4.12.0</MicrosoftCodeAnalysisCSharpVersion>
 		<MicrosoftCodeAnalysisAnalyzersVersion>3.11.0</MicrosoftCodeAnalysisAnalyzersVersion>
 		<NewtonsoftJsonVersion>13.0.3</NewtonsoftJsonVersion>