diff --git a/src/YANLib.Application/Validations/JsonValidation.cs b/src/YANLib.Application/Validations/JsonValidation.cs
index 1e77714..e6d0029 100644
--- a/src/YANLib.Application/Validations/JsonValidation.cs
+++ b/src/YANLib.Application/Validations/JsonValidation.cs
@@ -6,12 +6,12 @@
 
 namespace YANLib.Validations;
 
-public class JsonValidator : AbstractValidator<JsonDto>
+public sealed class JsonValidator : AbstractValidator<JsonDto>
 {
     public JsonValidator() => RuleFor(d => d.Id).NotNull().NotEmpty().WithErrorCode(ExceptionCode.BAD_REQUEST_ID).WithMessage(BAD_REQUEST_ID);
 }
 
-public class JsonValidators : AbstractValidator<List<JsonDto>>
+public sealed class JsonValidators : AbstractValidator<List<JsonDto>>
 {
     public JsonValidators()
     {