diff --git a/Sources/Data/EF/Players/PlayerDBManager.cs b/Sources/Data/EF/Players/PlayerDBManager.cs
index 7509c3b..d84cdfa 100644
--- a/Sources/Data/EF/Players/PlayerDBManager.cs
+++ b/Sources/Data/EF/Players/PlayerDBManager.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace Data.EF.Players
 {
-    internal class PlayerDBManager : IManager<PlayerEntity>, IDisposable
+    internal sealed class PlayerDBManager : IManager<PlayerEntity>, IDisposable
     {
         private readonly DiceAppDbContext db = new DiceAppDbContextWithStub();