diff --git a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/tournament/TournamentService.java b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/tournament/TournamentService.java
index 8358b3790..e6a430e97 100644
--- a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/tournament/TournamentService.java
+++ b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/tournament/TournamentService.java
@@ -27,6 +27,7 @@ import java.time.Duration;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeParseException;
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 
 public class TournamentService {
     private final ProductLibrary _productLibrary;
@@ -47,8 +48,8 @@ public class TournamentService {
     private static final Duration _tournamentRepeatPeriod = Duration.ofDays(2);
     private static final int _scheduledTournamentLoadTime = 7; // In days; one week
 
-    private final Map<String, Tournament> _activeTournaments = new LinkedHashMap<>();
-    private final Map<String, TournamentQueue> _tournamentQueues = new LinkedHashMap<>();
+    private final Map<String, Tournament> _activeTournaments = new ConcurrentHashMap<>();
+    private final Map<String, TournamentQueue> _tournamentQueues = new ConcurrentHashMap<>();
 
     public TournamentService(CollectionsManager collectionsManager, ProductLibrary productLibrary, DraftPackStorage draftPackStorage,
                              TournamentDAO tournamentDao, TournamentPlayerDAO tournamentPlayerDao, TournamentMatchDAO tournamentMatchDao,
@@ -487,7 +488,7 @@ public class TournamentService {
         return result;
     }
 
-    public List<Tournament> getLiveTournaments() {
+    public synchronized List<Tournament> getLiveTournaments() {
         return new ArrayList<>(_activeTournaments.values());
     }