diff --git a/Sources/CoreLibrary/Plateau.cs b/Sources/CoreLibrary/Plateau.cs
index 5e421d3..2081cf0 100644
--- a/Sources/CoreLibrary/Plateau.cs
+++ b/Sources/CoreLibrary/Plateau.cs
@@ -1,4 +1,5 @@
 using CoreLibrary.Exceptions;
+using System.Security.Cryptography;
 
 namespace CoreLibrary
 {
@@ -7,8 +8,6 @@ namespace CoreLibrary
     /// </summary>
     public class Plateau
     {
-        private static Random random = new Random();
-
         private readonly Code codeSecret;
         private readonly Code?[] grille;
         private readonly IEnumerable<Indicateur>[] indicateurs;
@@ -62,7 +61,7 @@ namespace CoreLibrary
 
             for (int i = 0; i < tailleCode; ++i)
             {
-                codeSecret.AjouterJeton(new Jeton(couleurs[random.Next(couleurs.Length)]));
+                codeSecret.AjouterJeton(new Jeton(couleurs[RandomNumberGenerator.GetInt32(0, couleurs.Length)]));
             }
         }