diff --git a/src/Infrastructure/Data/ApplicationDbContextInitializer.cs b/src/Infrastructure/Data/ApplicationDbContextInitializer.cs
index bc57199..71abda5 100644
--- a/src/Infrastructure/Data/ApplicationDbContextInitializer.cs
+++ b/src/Infrastructure/Data/ApplicationDbContextInitializer.cs
@@ -1,4 +1,7 @@
-using Hutopy.Domain.Constants;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Hutopy.Domain.Constants;
 using Hutopy.Infrastructure.Identity;
 using Hutopy.Infrastructure.Identity.OwnedEntities;
 using Microsoft.AspNetCore.Builder;
diff --git a/src/Infrastructure/Identity/ApplicationUserManager.cs b/src/Infrastructure/Identity/ApplicationUserManager.cs
index 987c8b6..8125aae 100644
--- a/src/Infrastructure/Identity/ApplicationUserManager.cs
+++ b/src/Infrastructure/Identity/ApplicationUserManager.cs
@@ -1,4 +1,8 @@
-using Microsoft.AspNetCore.Identity;
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
diff --git a/src/Infrastructure/Identity/IdentityService.cs b/src/Infrastructure/Identity/IdentityService.cs
index b03c9e2..3d9bbc0 100644
--- a/src/Infrastructure/Identity/IdentityService.cs
+++ b/src/Infrastructure/Identity/IdentityService.cs
@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using Google.Apis.Oauth2.v2.Data;
 using System.Security.Claims;
+using System.Threading;
 using System.Threading.Tasks;
 using Hutopy.Application.Common.Interfaces;
 using Hutopy.Application.Common.Models;