diff --git a/Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/LobbyConnection.java b/Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/LobbyConnection.java
index 719faca..34021de 100644
--- a/Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/LobbyConnection.java
+++ b/Server/src/main/java/uulm/teamname/marvelous/server/lobbymanager/LobbyConnection.java
@@ -13,7 +13,7 @@ import java.util.HashSet;
 public class LobbyConnection {
     private Lobby lobby;
     private Participant player1, player2;
-    private HashSet<Participant> spectators;
+    private final HashSet<Participant> spectators;
 
     /**
      * Creates a new LobbyConnection from a given lobby