diff --git a/Command/BroadcasterCommand.php b/Command/BroadcasterCommand.php
index 79cd576..b93c6cc 100644
--- a/Command/BroadcasterCommand.php
+++ b/Command/BroadcasterCommand.php
@@ -9,7 +9,7 @@
 
 use Martin1982\LiveBroadcastBundle\Broadcaster\Scheduler;
 use Psr\Log\LoggerInterface;
-use React\EventLoop\Factory;
+use React\EventLoop\Loop;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -24,17 +24,17 @@ class BroadcasterCommand extends Command
     /**
      * @var Scheduler
      */
-    private $scheduler;
+    private Scheduler $scheduler;
 
     /**
      * @var LoggerInterface
      */
-    private $logger;
+    private LoggerInterface $logger;
 
     /**
      * @var int
      */
-    private $eventLoopTimer;
+    private int $eventLoopTimer;
 
     /**
      * @var string
@@ -47,7 +47,7 @@ class BroadcasterCommand extends Command
      * @param int             $eventLoopTimer
      *
      */
-    public function __construct(Scheduler $scheduler, LoggerInterface $logger, $eventLoopTimer = 10)
+    public function __construct(Scheduler $scheduler, LoggerInterface $logger, int $eventLoopTimer = 10)
     {
         $this->scheduler = $scheduler;
         $this->logger = $logger;
@@ -69,11 +69,11 @@ protected function configure(): void
     /**
      * {@inheritdoc}
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $scheduler = $this->scheduler;
 
-        $eventLoop = Factory::create();
+        $eventLoop = Loop::get();
         $eventLoop->addPeriodicTimer(
             $this->eventLoopTimer,
             function () use ($scheduler) {
@@ -86,5 +86,7 @@ function () use ($scheduler) {
         );
 
         $eventLoop->run();
+
+        return 0;
     }
 }
diff --git a/Command/ShellTestCommand.php b/Command/ShellTestCommand.php
index 86586cd..7fcf656 100644
--- a/Command/ShellTestCommand.php
+++ b/Command/ShellTestCommand.php
@@ -21,17 +21,17 @@ class ShellTestCommand extends Command
     /**
      * @var bool
      */
-    private $isWindows = false;
+    private bool $isWindows = false;
 
     /**
      * @var bool
      */
-    private $isMac = false;
+    private bool $isMac = false;
 
     /**
      * @var bool
      */
-    private $isLinux = false;
+    private bool $isLinux = false;
 
     /**
      * @var string
@@ -51,7 +51,7 @@ protected function configure(): void
     /**
      * {@inheritdoc}
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         switch (strtoupper(substr(PHP_OS, 0, 3))) {
             case 'WIN':
@@ -89,6 +89,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $output->write('Checking \'grep\' command availability... ');
             $this->testGrep($output);
         }
+
+        return 0;
     }
 
     /**
@@ -164,7 +166,7 @@ protected function testKill(OutputInterface $output): void
      * @param string          $testable
      * @param OutputInterface $output
      */
-    protected function analyseResult($cmdResult, $testable, OutputInterface $output): void
+    protected function analyseResult(array $cmdResult, string $testable, OutputInterface $output): void
     {
         if (count($cmdResult) && 0 !== preg_match('/'.$testable.'/', implode($cmdResult))) {
             $output->writeln('<info>[OK]</info>');