diff --git a/plugin.yml b/plugin.yml
index 76a6900..bc5d0e4 100644
--- a/plugin.yml
+++ b/plugin.yml
@@ -1,7 +1,7 @@
 name: SimpleAuth
 main: SimpleAuth\SimpleAuth
-version: 1.7.1
-api: 1.12.0
+version: 1.7.2
+api: 2.0.0
 load: STARTUP
 author: PocketMine Team
 authors: [shoghicp]
diff --git a/src/SimpleAuth/EventListener.php b/src/SimpleAuth/EventListener.php
index 10fe512..9d29ca0 100644
--- a/src/SimpleAuth/EventListener.php
+++ b/src/SimpleAuth/EventListener.php
@@ -50,7 +50,7 @@ public function __construct(SimpleAuth $plugin){
 	public function onPlayerJoin(PlayerJoinEvent $event){
 		if($this->plugin->getConfig()->get("authenticateByLastUniqueId") === true and $event->getPlayer()->hasPermission("simpleauth.lastid")){
 			$config = $this->plugin->getDataProvider()->getPlayer($event->getPlayer());
-			if($config !== null and $config["lastip"] === $event->getPlayer()->getUniqueId()){
+			if($config !== null and $config["lastip"] === $event->getPlayer()->getUniqueId()->toString()){
 				$this->plugin->authenticatePlayer($event->getPlayer());
 				return;
 			}
diff --git a/src/SimpleAuth/SimpleAuth.php b/src/SimpleAuth/SimpleAuth.php
index 5824cd7..85048d1 100644
--- a/src/SimpleAuth/SimpleAuth.php
+++ b/src/SimpleAuth/SimpleAuth.php
@@ -101,7 +101,7 @@ public function authenticatePlayer(Player $player){
 			$player->removeAttachment($attachment);
 			unset($this->needAuth[spl_object_hash($player)]);
 		}
-		$this->provider->updatePlayer($player, $player->getUniqueId(), time());
+		$this->provider->updatePlayer($player, $player->getUniqueId()->toString(), time());
 		$player->sendMessage(TextFormat::GREEN . $this->getMessage("login.success"));
 
 		$this->getMessageTask()->removePlayer($player);
diff --git a/src/SimpleAuth/task/ShowMessageTask.php b/src/SimpleAuth/task/ShowMessageTask.php
index 7ea52a1..ca07d1f 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;
+		$this->playerList[$player->getUniqueId()->toString()] = $player;
 	}
 
 	public function removePlayer(Player $player){
-		unset($this->playerList[$player->getUniqueId()]);
+		unset($this->playerList[$player->getUniqueId()->toString()]);
 	}
 
 	public function onRun($currentTick){