diff --git a/src/Digdir.Domain.Dialogporten.GraphQL/EndUser/SearchDialogs/SearchDialogInputValidator.cs b/src/Digdir.Domain.Dialogporten.GraphQL/EndUser/SearchDialogs/SearchDialogInputValidator.cs
index 160782521..b8ab89847 100644
--- a/src/Digdir.Domain.Dialogporten.GraphQL/EndUser/SearchDialogs/SearchDialogInputValidator.cs
+++ b/src/Digdir.Domain.Dialogporten.GraphQL/EndUser/SearchDialogs/SearchDialogInputValidator.cs
@@ -3,7 +3,7 @@
 namespace Digdir.Domain.Dialogporten.GraphQL.EndUser.SearchDialogs;
 
 // ReSharper disable once ClassNeverInstantiated.Global
-public class SearchDialogInputValidator : AbstractValidator<SearchDialogInput>
+public sealed class SearchDialogInputValidator : AbstractValidator<SearchDialogInput>
 {
     public SearchDialogInputValidator()
     {