diff --git a/src/Enums/TournamentSystem.php b/src/Enums/TournamentSystem.php
index 2109555..0028632 100644
--- a/src/Enums/TournamentSystem.php
+++ b/src/Enums/TournamentSystem.php
@@ -27,6 +27,7 @@ use MyCLabs\Enum\Enum;
 class TournamentSystem extends Enum
 {
     const Swiss = 'Swiss';
+    const DoubleSwiss = 'Swiss Double';
     const Closed = 'Closed';
     const American = 'American';
     const Keizer = 'Keizer';