diff --git a/src/SimpleAuth/task/ShowMessageTask.php b/src/SimpleAuth/task/ShowMessageTask.php
index 7ea52a1..4a1be52 100644
--- a/src/SimpleAuth/task/ShowMessageTask.php
+++ b/src/SimpleAuth/task/ShowMessageTask.php
@@ -39,11 +39,11 @@ public function getPlugin(){
 	}
 
 	public function addPlayer(Player $player){
-		$this->playerList[$player->getUniqueId()] = $player;
+		$this->playerList[spl_object_hash($player->getUniqueId())] = $player;
 	}
 
 	public function removePlayer(Player $player){
-		unset($this->playerList[$player->getUniqueId()]);
+		$this->playerList[spl_object_hash($player->getUniqueId())] = null;
 	}
 
 	public function onRun($currentTick){
@@ -53,8 +53,10 @@ public function onRun($currentTick){
 		}
 
 		foreach($this->playerList as $player){
+			if($player==null){
+				continue;
+			}
 			$player->sendPopup(TextFormat::ITALIC . TextFormat::GRAY . $this->getPlugin()->getMessage("join.popup"));
 		}
 	}
-
-}
\ No newline at end of file
+}