diff --git a/EntityFrameworkCore.Domain/League.cs b/EntityFrameworkCore.Domain/League.cs
index 8f55a9d..9ef4800 100644
--- a/EntityFrameworkCore.Domain/League.cs
+++ b/EntityFrameworkCore.Domain/League.cs
@@ -3,5 +3,5 @@
 public class League : BaseDomainModel
 {
   public string? Name { get; set; }
-  public List<Team> Teams { get; set; }
+  public List<Team>? Teams { get; set; }
 }
diff --git a/EntityFrameworkCore.Domain/Team.cs b/EntityFrameworkCore.Domain/Team.cs
index d90b1dc..1362461 100644
--- a/EntityFrameworkCore.Domain/Team.cs
+++ b/EntityFrameworkCore.Domain/Team.cs
@@ -3,7 +3,7 @@
 public class Team : BaseDomainModel
 {
   public string? Name { get; set; }
-  public League League { get; set; }
-  public int LeagueId { get; set; }
+  public League? League { get; set; }
+  public int? LeagueId { get; set; }
   public int CoachId { get; set; }
 }