diff --git a/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/DynamicQueryObjectType.cs b/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/DynamicQueryObjectType.cs
index 564f955..5519d72 100644
--- a/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/DynamicQueryObjectType.cs
+++ b/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/DynamicQueryObjectType.cs
@@ -61,6 +61,9 @@ namespace PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery
 
                     f.Type(resultType);
 
+                    // middleware to validate.
+                    f.Use<QueryValidationMiddleware>();
+
                     // resolver
                     f.Resolve(async r =>
                     {
diff --git a/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery.csproj b/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery.csproj
index c97f193..cb249a0 100644
--- a/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery.csproj
+++ b/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery/PoweredSoft.CQRS.GraphQL.HotChocolate.DynamicQuery.csproj
@@ -11,6 +11,7 @@
   <ItemGroup>
     <ProjectReference Include="..\PoweredSoft.CQRS.Abstractions\PoweredSoft.CQRS.Abstractions.csproj" />
     <ProjectReference Include="..\PoweredSoft.CQRS.GraphQL.DynamicQuery\PoweredSoft.CQRS.GraphQL.DynamicQuery.csproj" />
+    <ProjectReference Include="..\PoweredSoft.CQRS.GraphQL.HotChocolate\PoweredSoft.CQRS.GraphQL.HotChocolate.csproj" />
   </ItemGroup>
 
 </Project>