diff --git a/src/backend/Directory.Packages.props b/src/backend/Directory.Packages.props
index 68165c97..14535a91 100644
--- a/src/backend/Directory.Packages.props
+++ b/src/backend/Directory.Packages.props
@@ -48,7 +48,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
-    <PackageVersion Include="NSubstitute" Version="5.3.0" />
+    <PackageVersion Include="NSubstitute" Version="6.1.0" />
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="$(FrameworkVersion)" />
     <PackageVersion Include="NetArchTest.Rules" Version="1.3.2" />