diff --git a/src/ChannelManagers/LocalChannelManager.php b/src/ChannelManagers/LocalChannelManager.php
index d782fc7..4d4c835 100644
--- a/src/ChannelManagers/LocalChannelManager.php
+++ b/src/ChannelManagers/LocalChannelManager.php
@@ -10,7 +10,6 @@ use BeyondCode\LaravelWebSockets\Helpers;
 use Illuminate\Support\Str;
 use Ratchet\ConnectionInterface;
 use React\EventLoop\LoopInterface;
-use React\Promise\FulfilledPromise;
 use React\Promise\PromiseInterface;
 use stdClass;
 
diff --git a/src/ChannelManagers/RedisChannelManager.php b/src/ChannelManagers/RedisChannelManager.php
index 6b02436..58ae6d4 100644
--- a/src/ChannelManagers/RedisChannelManager.php
+++ b/src/ChannelManagers/RedisChannelManager.php
@@ -202,7 +202,7 @@ class RedisChannelManager extends LocalChannelManager
             ->then(function () use ($connection, $channelName) {
                 return $this->removeChannelFromSet($connection->app->id, $channelName);
             })
-            ->then(function () use($connection) {
+            ->then(function () use ($connection) {
                 return $this->removeConnectionFromSet($connection);
             })
             ->then(function () use ($connection, $channelName, $payload) {
diff --git a/src/Channels/PresenceChannel.php b/src/Channels/PresenceChannel.php
index c265f81..3191be4 100644
--- a/src/Channels/PresenceChannel.php
+++ b/src/Channels/PresenceChannel.php
@@ -28,7 +28,7 @@ class PresenceChannel extends PrivateChannel
 
         $this->channelManager
             ->userJoinedPresenceChannel($connection, $user, $this->getName(), $payload)
-            ->then(function () use ($connection, $user) {
+            ->then(function () use ($connection) {
                 $this->channelManager
                     ->getChannelMembers($connection->app->id, $this->getName())
                     ->then(function ($users) use ($connection) {
diff --git a/src/Statistics/Collectors/MemoryCollector.php b/src/Statistics/Collectors/MemoryCollector.php
index 23f52cd..2bb2630 100644
--- a/src/Statistics/Collectors/MemoryCollector.php
+++ b/src/Statistics/Collectors/MemoryCollector.php
@@ -7,7 +7,6 @@ use BeyondCode\LaravelWebSockets\Contracts\StatisticsCollector;
 use BeyondCode\LaravelWebSockets\Facades\StatisticsStore;
 use BeyondCode\LaravelWebSockets\Helpers;
 use BeyondCode\LaravelWebSockets\Statistics\Statistic;
-use React\Promise\FulfilledPromise;
 use React\Promise\PromiseInterface;
 
 class MemoryCollector implements StatisticsCollector