diff --git a/services/Directory/FilterLists.Directory.Application/Validators/ValidatorPipelineBehavior.cs b/services/Directory/FilterLists.Directory.Application/Validators/ValidatorPipelineBehavior.cs
index d58fcada0..5c58415c2 100644
--- a/services/Directory/FilterLists.Directory.Application/Validators/ValidatorPipelineBehavior.cs
+++ b/services/Directory/FilterLists.Directory.Application/Validators/ValidatorPipelineBehavior.cs
@@ -4,7 +4,7 @@
 namespace FilterLists.Directory.Application.Validators;
 
 internal class ValidatorPipelineBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
-    where TRequest : notnull
+    where TRequest : IRequest<TResponse>
 {
     private readonly IEnumerable<IValidator<TRequest>> _validators;