diff --git a/src/Nocr.Users.Api.Contracts/Users/Dto/Requests/CreateUserRequest.cs b/src/Nocr.Users.Api.Contracts/Users/Dto/Requests/CreateUserRequest.cs
index 6cbc960..3d00f95 100644
--- a/src/Nocr.Users.Api.Contracts/Users/Dto/Requests/CreateUserRequest.cs
+++ b/src/Nocr.Users.Api.Contracts/Users/Dto/Requests/CreateUserRequest.cs
@@ -2,7 +2,7 @@ namespace Nocr.Users.Api.Contracts.Users.Dto.Requests;
 
 public sealed class CreateUserRequest
 {
-    public string Username { get; set; }
+    public required string Username { get; set; }
     
     public string? Email { get; set; }
     
diff --git a/src/Nocr.Users.Api.Contracts/Users/Dto/UserData.cs b/src/Nocr.Users.Api.Contracts/Users/Dto/UserData.cs
index 622ca58..70b768b 100644
--- a/src/Nocr.Users.Api.Contracts/Users/Dto/UserData.cs
+++ b/src/Nocr.Users.Api.Contracts/Users/Dto/UserData.cs
@@ -7,10 +7,10 @@ public sealed class UserData
     /// <summary>
     /// Имя пользователя
     /// </summary>
-    public string Username { get; set; }
+    public required string Username { get; set; }
     
     /// <summary>
     /// Список идентити пользователя
     /// </summary>
-    public UserIdentityData[] Identities { get; set; }
+    public required UserIdentityData[] Identities { get; set; }
 }
\ No newline at end of file
diff --git a/src/Nocr.Users.Api.Contracts/Users/Dto/UserIdentityData.cs b/src/Nocr.Users.Api.Contracts/Users/Dto/UserIdentityData.cs
index 873a9b0..11746fb 100644
--- a/src/Nocr.Users.Api.Contracts/Users/Dto/UserIdentityData.cs
+++ b/src/Nocr.Users.Api.Contracts/Users/Dto/UserIdentityData.cs
@@ -12,5 +12,5 @@ public sealed class UserIdentityData
     /// <summary>
     /// Идентити
     /// </summary>
-    public string Identity { get; set; }
+    public required string Identity { get; set; }
 }
\ No newline at end of file
diff --git a/src/Nocr.Users.AppServices/Users/User.cs b/src/Nocr.Users.AppServices/Users/User.cs
index f9d3265..278bc5b 100644
--- a/src/Nocr.Users.AppServices/Users/User.cs
+++ b/src/Nocr.Users.AppServices/Users/User.cs
@@ -4,7 +4,7 @@ public sealed class User
 {
     public long Id { get; set; }
 
-    public string Username { get; private set; }
+    public string Username { get; private set; } = default!;
 
     private readonly List<UserIdentity> _identities = new();