diff --git a/lib/Logitar.Identity.Core/Logitar.Identity.Core.csproj b/lib/Logitar.Identity.Core/Logitar.Identity.Core.csproj
index c7f3dff..c59d151 100644
--- a/lib/Logitar.Identity.Core/Logitar.Identity.Core.csproj
+++ b/lib/Logitar.Identity.Core/Logitar.Identity.Core.csproj
@@ -24,7 +24,10 @@
 
   <ItemGroup>
     <Using Include="System" />
+    <Using Include="System.Collections.Generic" />
     <Using Include="System.Diagnostics.CodeAnalysis" />
+    <Using Include="System.Linq" />
+    <Using Include="System.Text.Json.Serialization" />
   </ItemGroup>
 
 </Project>
diff --git a/lib/Logitar.Identity.Core/Roles/Events/RoleUpdated.cs b/lib/Logitar.Identity.Core/Roles/Events/RoleUpdated.cs
index 4aac502..b0c3499 100644
--- a/lib/Logitar.Identity.Core/Roles/Events/RoleUpdated.cs
+++ b/lib/Logitar.Identity.Core/Roles/Events/RoleUpdated.cs
@@ -1,7 +1,5 @@
 using Logitar.EventSourcing;
 using MediatR;
-using System.Collections.Generic;
-using System.Text.Json.Serialization;
 
 namespace Logitar.Identity.Core.Roles.Events;
 
diff --git a/lib/Logitar.Identity.Core/Roles/Role.cs b/lib/Logitar.Identity.Core/Roles/Role.cs
index 2285154..74826d0 100644
--- a/lib/Logitar.Identity.Core/Roles/Role.cs
+++ b/lib/Logitar.Identity.Core/Roles/Role.cs
@@ -1,6 +1,5 @@
 using Logitar.EventSourcing;
 using Logitar.Identity.Core.Roles.Events;
-using System.Collections.Generic;
 
 namespace Logitar.Identity.Core.Roles;
 
diff --git a/lib/Logitar.Identity.Core/Validators/AllowedCharactersValidator.cs b/lib/Logitar.Identity.Core/Validators/AllowedCharactersValidator.cs
index 7cba636..f35bf6d 100644
--- a/lib/Logitar.Identity.Core/Validators/AllowedCharactersValidator.cs
+++ b/lib/Logitar.Identity.Core/Validators/AllowedCharactersValidator.cs
@@ -1,6 +1,5 @@
 using FluentValidation;
 using FluentValidation.Validators;
-using System.Linq;
 
 namespace Logitar.Identity.Core.Validators;