diff --git a/Blazor/Blazor/Models/AdministratorModel.cs b/Blazor/Blazor/Models/AdministratorModel.cs
index 0fdf7c4..91d1dd6 100644
--- a/Blazor/Blazor/Models/AdministratorModel.cs
+++ b/Blazor/Blazor/Models/AdministratorModel.cs
@@ -15,6 +15,8 @@ public class AdministratorModel
     public string Username { get; set; }
 
     [Required(ErrorMessage = "Password is required")]
+    [RegularExpression(@"^[^\s]+$", ErrorMessage = "Le champ ne doit pas contenir d'espaces.")]
+    [StringLength(255, ErrorMessage = "{0} length must be between {2} and {1}.", MinimumLength = 6)]
     public string HashedPassword { get; set; }
 
     public void HashPassword(string password)
diff --git a/Blazor/Blazor/Models/PlayerModel.cs b/Blazor/Blazor/Models/PlayerModel.cs
index 7cdd986..a8da40a 100644
--- a/Blazor/Blazor/Models/PlayerModel.cs
+++ b/Blazor/Blazor/Models/PlayerModel.cs
@@ -14,6 +14,8 @@ public class PlayerModel
     public string Nickname { get; set; }
 
     [Required(ErrorMessage = "Password is required")]
+    [RegularExpression(@"^[^\s]+$", ErrorMessage = "Le champ ne doit pas contenir d'espaces.")]
+    [StringLength(255, ErrorMessage = "{0} length must be between {2} and {1}.", MinimumLength = 6)]
     public string HashedPassword { get; set; }
 
     public void HashPassword(string password)