diff --git a/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java b/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
index 943623467c1..168071bfe12 100644
--- a/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
+++ b/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
@@ -1,6 +1,7 @@
 package forge.tournament.system;
 
 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
+
 import forge.LobbyPlayer;
 import forge.player.GamePlayerUtil;
 import forge.util.MyRandom;
@@ -10,6 +11,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+@SuppressWarnings("serial")
 public abstract class AbstractTournament implements Serializable {
     protected int activeRound;
     protected int totalRounds;
diff --git a/forge-gui/src/main/java/forge/tournament/system/TournamentBracket.java b/forge-gui/src/main/java/forge/tournament/system/TournamentBracket.java
index cad32838b40..29600284826 100644
--- a/forge-gui/src/main/java/forge/tournament/system/TournamentBracket.java
+++ b/forge-gui/src/main/java/forge/tournament/system/TournamentBracket.java
@@ -3,6 +3,7 @@ package forge.tournament.system;
 import java.util.ArrayList;
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentBracket extends AbstractTournament {
     // Bracket implies single elimination. For non-single elimination, use Swiss or RoundRobin
     public TournamentBracket(int ttlRnds, int pairingAmount) {
diff --git a/forge-gui/src/main/java/forge/tournament/system/TournamentRoundRobin.java b/forge-gui/src/main/java/forge/tournament/system/TournamentRoundRobin.java
index b85d76d4221..17691084bce 100644
--- a/forge-gui/src/main/java/forge/tournament/system/TournamentRoundRobin.java
+++ b/forge-gui/src/main/java/forge/tournament/system/TournamentRoundRobin.java
@@ -2,6 +2,7 @@ package forge.tournament.system;
 
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentRoundRobin extends AbstractTournament {
     // Round Robin tournaments where you play everyone in your group/pod. Declare winner or break to top X
     public TournamentRoundRobin(int ttlRnds, List<TournamentPlayer> allPlayers) {
diff --git a/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java b/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
index 063ea506e05..c02ab93df64 100644
--- a/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
+++ b/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
@@ -2,6 +2,7 @@ package forge.tournament.system;
 
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentSwiss extends AbstractTournament {
 
     public TournamentSwiss(int ttlRnds, List<TournamentPlayer> allPlayers) {