diff --git a/test/Directory.Build.targets b/test/Directory.Build.targets
index c6b5ed2..9fca64f 100644
--- a/test/Directory.Build.targets
+++ b/test/Directory.Build.targets
@@ -14,7 +14,7 @@
 
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="6.12.1" />
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.17">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>