diff --git a/README.md b/README.md
index 79de889..9601da0 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Card o-- Suit
 class Pile extends ArrayList {
   public static Pile createDeck(int numberOfCards)
   public Pile getCardsForPlayer(int number)
-  public void shuffle()
+  public void shuffle(Random random)
   public boolean uniqueMaximum(Card max, int maxIndex)
 }