diff --git a/lang/csharp/versions.props b/lang/csharp/versions.props
index 7113178d624..dbeb00b37c5 100644
--- a/lang/csharp/versions.props
+++ b/lang/csharp/versions.props
@@ -58,7 +58,7 @@
     <MicrosoftNETTestSdkVersion>16.9.4</MicrosoftNETTestSdkVersion>
     <NUnitVersion>3.13.2</NUnitVersion>
     <NUnitConsoleRunnerVersion>3.12.0</NUnitConsoleRunnerVersion>
-    <NUnit3TestAdapterVersion>3.17.0</NUnit3TestAdapterVersion>
+    <NUnit3TestAdapterVersion>4.2.1</NUnit3TestAdapterVersion>
     <StyleCopAnalyzersVersion>1.1.118</StyleCopAnalyzersVersion>
   </PropertyGroup>
 </Project>