diff --git a/.travis.yml b/.travis.yml
index 317d9a1..a94207d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 env:
   global:
-    - PACKAGE_VERSION="3.0.0-rc2"
+    - PACKAGE_VERSION="3.0.0-rc3"
     - PACKAGE_ICON="https://www.enbiso.com/logo.svg"
     - PACKAGE_PROJECT="https://nlib.enbiso.com"
     - PACKAGE_REPO="https://github.com/enbiso/Enbiso.NLib"
diff --git a/Enbiso.NLib.Cqrs/CommandValidator.cs b/Enbiso.NLib.Cqrs/CommandValidator.cs
index 64c2676..51d85f0 100644
--- a/Enbiso.NLib.Cqrs/CommandValidator.cs
+++ b/Enbiso.NLib.Cqrs/CommandValidator.cs
@@ -21,8 +21,11 @@ public ValidatorBehavior(IEnumerable<ICommandValidator<TCommand>> validators)
         public async Task<TResponse> Handle(TCommand request, CancellationToken cancellationToken,
             RequestHandlerDelegate<TResponse> next)
         {
-            var failures = _validators.SelectMany(v => v.Validate(request)).Where(error => error != null).ToArray();
 
+            var validatorTasks = _validators.Select(v => v.Validate(request)).ToArray();
+            await Task.WhenAll(validatorTasks);
+            var failures = validatorTasks.SelectMany(t => t.Result).Where(error => error != null).ToArray();
+            
             if (failures.Any())                                    
                 throw new CommandValidationException(typeof(TCommand), failures);
 
@@ -38,7 +41,7 @@ public ValidatorBehavior(IEnumerable<ICommandValidator<TCommand>> validators)
     public interface ICommandValidator<TCommand> 
         where TCommand: IBaseCommand        
     {
-        IEnumerable<ValidationError> Validate(TCommand command);
+        Task<IEnumerable<ValidationError>> Validate(TCommand command);
     }
     
     /// <summary>