diff --git a/src/Application/UseCase/GenerateGamesCalendar.php b/src/Application/UseCase/GenerateGamesCalendar.php
index af62162..6f1a0d9 100644
--- a/src/Application/UseCase/GenerateGamesCalendar.php
+++ b/src/Application/UseCase/GenerateGamesCalendar.php
@@ -57,6 +57,7 @@ class GenerateGamesCalendar
             $away = $this->entityManager->getRepository(Team::class)->find($game->awayTeamId) ?? throw new \Exception('Team not found');
 
             $events[] = Event::create($away->name . ' vs ' . $home->name)
+                ->uniqueIdentifier($game->id)
                 ->startsAt($game->startTimeScheduled)
                 ->endsAt($game->endTimeScheduled ?? $game->startTimeScheduled->modify('+3 hours')) // should be a parameter of the league
                 ->address($game->venue);