diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cf292c9..510ffcf 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,32 +15,23 @@ jobs:
         strategy:
             matrix:
                 php-version:
-                    - "7.2"
-                    - "7.3"
                     - "7.4"
-                    - "8.0"
                     - "8.1"
+                    - "8.2"
+                    - "8.3"
                 symfony-version:
-                    - "3.4.x"
-                    - "4.4.x"
-                    - "5.3.x"
                     - "5.4.x"
+                    - "6.4.x"
+                    - "7.0.x"
                 monolog-version:
-                    - "^1.25"
-                    - "^2.2"
-                include:
-                    - php-version: "8.0"
-                      symfony-version: "6.0.x"
-                      monolog-version: "^1.25"
-                    - php-version: "8.1"
-                      symfony-version: "6.0.x"
-                      monolog-version: "^1.25"
-                    - php-version: "8.0"
-                      symfony-version: "6.0.x"
-                      monolog-version: "^2.2"
-                    - php-version: "8.1"
-                      symfony-version: "6.0.x"
-                      monolog-version: "^2.2"
+                    - "^2.9"
+                exclude:
+                  - php-version: "7.4"
+                    symfony-version: "6.4.x"
+                  - php-version: "7.4"
+                    symfony-version: "7.0.x"
+                  - php-version: "8.1"
+                    symfony-version: "7.0.x"
 
         steps:
             - name: "Checkout"
diff --git a/Command/ListCommand.php b/Command/ListCommand.php
index af00a55..8e8b3dd 100644
--- a/Command/ListCommand.php
+++ b/Command/ListCommand.php
@@ -17,10 +17,7 @@ class ListCommand extends Command
 {
     private const NUMBER_OF_RUN_DATES = 3;
 
-    /**
-     * @var Scheduler
-     */
-    private $scheduler;
+    private Scheduler $scheduler;
 
     public function __construct(Scheduler $scheduler)
     {
@@ -70,6 +67,6 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $table->render();
 
-        return 0;
+        return self::SUCCESS;
     }
 }
diff --git a/Command/RunCommand.php b/Command/RunCommand.php
index 6ed91fb..f6a9f1c 100644
--- a/Command/RunCommand.php
+++ b/Command/RunCommand.php
@@ -7,6 +7,7 @@
 
 namespace Rewieer\TaskSchedulerBundle\Command;
 
+use Exception;
 use Rewieer\TaskSchedulerBundle\Task\Scheduler;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
@@ -16,10 +17,7 @@
 
 class RunCommand extends Command
 {
-    /**
-     * @var Scheduler
-     */
-    private $scheduler;
+    private Scheduler $scheduler;
 
     public function __construct(Scheduler $scheduler)
     {
@@ -42,7 +40,6 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $id = $input->getArgument("id");
         $class = $input->getOption("class");
 
-
         if (!$id && !$class) {
             $this->scheduler->run();
         } elseif ($class) {
@@ -50,21 +47,21 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             foreach ($tasks as $task) {
                 if (strpos(get_class($task), "\\$class")) {
                     $this->scheduler->runTask($task);
-                    return 0;
+                    return self::SUCCESS;
                 }
             }
-            throw new \Exception("There are no tasks corresponding to this class name");
+            throw new Exception("There are no tasks corresponding to this class name");
         } else {
             $tasks = $this->scheduler->getTasks();
             $id = (int)$id;
 
             if (array_key_exists($id - 1, $tasks) === false) {
-                throw new \Exception("There are no tasks corresponding to this ID");
+                throw new Exception("There are no tasks corresponding to this ID");
             }
 
             $this->scheduler->runTask($tasks[$id - 1]);
         }
 
-        return 0;
+        return self::SUCCESS;
     }
 }
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 2edcbc6..e772d63 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -20,13 +20,6 @@ class Configuration implements ConfigurationInterface
 {
     public function getConfigTreeBuilder(): TreeBuilder
     {
-        $treeBuilder = new TreeBuilder('rewieer_task_scheduler');
-
-        if (false === \method_exists($treeBuilder, 'getRootNode')) {
-            // BC layer for symfony/config 4.1 and older
-            $treeBuilder->root('rewieer_task_scheduler');
-        }
-
-        return $treeBuilder;
+        return new TreeBuilder('rewieer_task_scheduler');
     }
 }
diff --git a/Services/SchedulerLogger.php b/Services/SchedulerLogger.php
index c1541be..710f37b 100644
--- a/Services/SchedulerLogger.php
+++ b/Services/SchedulerLogger.php
@@ -21,9 +21,9 @@
  */
 class SchedulerLogger implements EventSubscriberInterface
 {
-    private $logger;
-    private $start;
-    private $current;
+    private LoggerInterface $logger;
+    private ?float $start;
+    private ?float $current;
 
     public function __construct(LoggerInterface $logger)
     {
diff --git a/Task/AbstractScheduledTask.php b/Task/AbstractScheduledTask.php
index 3f562bd..68b27dc 100644
--- a/Task/AbstractScheduledTask.php
+++ b/Task/AbstractScheduledTask.php
@@ -12,10 +12,7 @@
 
 abstract class AbstractScheduledTask implements TaskInterface
 {
-    /**
-     * @var Schedule
-     */
-    private $schedule;
+    private Schedule $schedule;
 
     public function __construct()
     {
@@ -32,9 +29,6 @@ public function isDue($currentTime): bool
         return $this->schedule->isDue($currentTime);
     }
 
-    /**
-     * @return Schedule
-     */
     public function getSchedule(): Schedule
     {
         return $this->schedule;
diff --git a/Task/Schedule.php b/Task/Schedule.php
index 6c262b2..06e380f 100644
--- a/Task/Schedule.php
+++ b/Task/Schedule.php
@@ -19,10 +19,7 @@
  */
 class Schedule
 {
-    /**
-     * @var CronExpression
-     */
-    private $cron;
+    private CronExpression $cron;
 
     /**
      * Schedule constructor.
@@ -36,7 +33,6 @@ public function __construct(string $expr = "* * * * *")
     /**
      * Sets the cron to work at these months
      * @param string|int $months
-     * @return $this
      */
     public function months($months): self
     {
@@ -48,7 +44,6 @@ public function months($months): self
      * Sets the cron to work at these days of the week
      * ATTENTION: resets daysOfMonth
      * @param string|int $days
-     * @return $this
      */
     public function daysOfWeek($days): self
     {
@@ -61,7 +56,6 @@ public function daysOfWeek($days): self
      * Sets the cron to work at these days of the month
      * ATTENTION: resets daysOfWeek
      * @param string|int $days
-     * @return $this
      */
     public function daysOfMonth($days): self
     {
@@ -72,7 +66,6 @@ public function daysOfMonth($days): self
 
     /**
      * Sets the cron to work every day
-     * @return $this
      */
     public function daily(): self
     {
@@ -83,7 +76,6 @@ public function daily(): self
     /**
      * Set the cron to work at these hours
      * @param string|int $hours
-     * @return $this
      */
     public function hours($hours): self
     {
@@ -94,7 +86,6 @@ public function hours($hours): self
     /**
      * Set the cron to work at these minutes
      * @param string|int $minutes
-     * @return $this
      */
     public function minutes($minutes): self
     {
@@ -105,7 +96,6 @@ public function minutes($minutes): self
     /**
      * Set the cron to work at every x minutes
      * @param int $minutes
-     * @return $this
      */
     public function everyMinutes(int $minutes = 1): self
     {
@@ -115,7 +105,6 @@ public function everyMinutes(int $minutes = 1): self
     /**
      * Set the cron to work at every x hours
      * @param int $hours
-     * @return $this
      */
     public function everyHours(int $hours = 1): self
     {
@@ -125,10 +114,6 @@ public function everyHours(int $hours = 1): self
     /**
      * Generic function to update a cron part as an "everyX" pattern
      * such as "every 3 hours" or "every 10 minutes"
-     *
-     * @param int $time
-     * @param int $part
-     * @return $this
      */
     public function everyX(int $time = 1, int $part = CronExpression::MINUTE): self
     {
@@ -142,17 +127,11 @@ public function everyX(int $time = 1, int $part = CronExpression::MINUTE): self
         return $this;
     }
 
-    /**
-     * @return CronExpression
-     */
     public function getCron(): CronExpression
     {
         return $this->cron;
     }
 
-    /**
-     * @return string
-     */
     public function getExpression(): string
     {
         return $this->cron->getExpression();
@@ -161,8 +140,6 @@ public function getExpression(): string
     /**
      * Allows setting entire expression in string format like "0 * 2,7,12 * 7"
      * Exposes CronExpressions method directly
-     * @param string $value
-     * @return $this
      */
     public function setExpression(string $value): self
     {
@@ -170,11 +147,6 @@ public function setExpression(string $value): self
         return $this;
     }
 
-    /**
-     * @param int $position
-     * @param string $value
-     * @return $this
-     */
     public function setPart(int $position, string $value): self
     {
         $this->cron->setPart($position, $value);
@@ -184,7 +156,6 @@ public function setPart(int $position, string $value): self
     /**
      * Return true if the schedule is due to now
      * @param DateTimeInterface|string $currentTime
-     * @return bool
      */
     public function isDue($currentTime = 'now'): bool
     {
diff --git a/Task/Scheduler.php b/Task/Scheduler.php
index 99f3a16..13c8b2e 100644
--- a/Task/Scheduler.php
+++ b/Task/Scheduler.php
@@ -13,10 +13,7 @@
 
 class Scheduler
 {
-    /**
-     * @var EventDispatcher
-     */
-    private $dispatcher;
+    private EventDispatcher $dispatcher;
 
     public function __construct(EventDispatcher $dispatcher = null)
     {
@@ -32,19 +29,11 @@ public function __construct(EventDispatcher $dispatcher = null)
      */
     private $tasks = [];
 
-    /**
-     * Adds the task to the task stack
-     * @param TaskInterface $task
-     */
     public function addTask(TaskInterface $task): void
     {
         $this->tasks[] = $task;
     }
 
-    /**
-     * Run due tasks
-     * @param DateTimeInterface|string $currentTime
-     */
     public function run($currentTime = "now"): void
     {
         $this->dispatcher->dispatch(SchedulerEvents::ON_START);
@@ -60,10 +49,6 @@ public function run($currentTime = "now"): void
         $this->dispatcher->dispatch(SchedulerEvents::ON_END);
     }
 
-    /**
-     * Run the task
-     * @param TaskInterface $task
-     */
     public function runTask(TaskInterface $task): void
     {
         $this->dispatcher->dispatch(SchedulerEvents::BEFORE_TASK_RUNS, [$task]);
diff --git a/Task/TaskInterface.php b/Task/TaskInterface.php
index 808b6c7..0913746 100644
--- a/Task/TaskInterface.php
+++ b/Task/TaskInterface.php
@@ -15,13 +15,11 @@ interface TaskInterface
     /**
      * Return true if the task is due to now
      * @param DateTimeInterface|string $currentTime
-     * @return bool
      */
     public function isDue($currentTime): bool;
 
     /**
      * Get the next run dates for this job
-     * @param int $counter
      * @return string[]
      */
     public function getNextRunDates(int $counter): array;
diff --git a/composer.json b/composer.json
index af0e479..a76ce53 100644
--- a/composer.json
+++ b/composer.json
@@ -9,15 +9,15 @@
   },
   "keywords": ["cron", "task", "scheduler", "symfony", "bundle"],
   "require": {
-    "php": "^7.2|^8.0",
-    "symfony/framework-bundle": "^3.4|^4.4|^5.3|^6.0",
-    "symfony/console": "^3.4|^4.4|^5.3|^6.0",
-    "dragonmantank/cron-expression": "^2.3|^3.0"
+    "php": "^7.4|^8.1",
+    "symfony/framework-bundle": "^5.4|^6.4|^7.0",
+    "symfony/console": "^5.3|^6.4|^7.0",
+    "dragonmantank/cron-expression": "^3.3"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8.5",
-    "symfony/phpunit-bridge": "^5.3",
-    "monolog/monolog": "^1.25|^2.2"
+    "phpunit/phpunit": "^9.6",
+    "symfony/phpunit-bridge": "^6.4",
+    "monolog/monolog": "^2.9"
   },
   "license": "MIT",
   "authors": [