diff --git a/.travis.yml b/.travis.yml
index 7bc1d50..02d6c81 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -57,6 +57,12 @@ matrix:
     - php: 7.3
       env:
         - STORAGE=doctrine
+    - php: 7.4
+      env:
+        - STORAGE=array
+    - php: 7.4
+      env:
+        - STORAGE=doctrine
 
 before_install:
   - if [[ -z $CODE_COVERAGE ]]; then phpenv config-rm xdebug.ini ; fi
diff --git a/composer.json b/composer.json
index 0dc1ef1..b02cd2e 100644
--- a/composer.json
+++ b/composer.json
@@ -11,22 +11,22 @@
     ],
     "require": {
         "php": "^5.6 || ^7.0",
-        "php-task/php-task": "^1.3",
-        "symfony/http-kernel": "^2.8 || ^3.4 || ^4.0",
-        "symfony/dependency-injection": "^2.8 || ^3.4 || ^4.0",
-        "symfony/expression-language": "^2.8 || ^3.4 || ^4.0",
-        "symfony/config": "^2.8 || ^3.4 || ^4.0",
-        "symfony/console": "^2.8 || ^3.4 || ^4.0",
-        "symfony/process": "^2.8 || ^3.4 || ^4.0",
+        "php-task/php-task": "^1.4",
+        "symfony/http-kernel": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/dependency-injection": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/expression-language": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/config": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/console": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/process": "^2.8 || ^3.4 || ^4.0 || ^5.0",
         "doctrine/orm": "^2.5"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8 || ^5.0",
         "sebastian/comparator": "^1.2.3",
-        "symfony/debug": "^2.8 || ^3.4 || ^4.0",
-        "symfony/framework-bundle": "^2.8 || ^3.4 || ^4.0",
-        "symfony/finder": "^2.8 || ^3.4 || ^4.0",
-        "symfony/yaml": "^2.8 || ^3.4 || ^4.0",
+        "symfony/debug": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/framework-bundle": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/finder": "^2.8 || ^3.4 || ^4.0 || ^5.0",
+        "symfony/yaml": "^2.8 || ^3.4 || ^4.0 || ^5.0",
         "doctrine/doctrine-bundle": "^1.5",
         "doctrine/data-fixtures": "^1.1"
     },
diff --git a/src/Command/DebugTasksCommand.php b/src/Command/DebugTasksCommand.php
index 9cafb91..93f8910 100644
--- a/src/Command/DebugTasksCommand.php
+++ b/src/Command/DebugTasksCommand.php
@@ -84,5 +84,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         }
 
         $table->render();
+
+        return 0;
     }
 }
diff --git a/src/Command/RunCommand.php b/src/Command/RunCommand.php
index 6535b35..0edc7a1 100644
--- a/src/Command/RunCommand.php
+++ b/src/Command/RunCommand.php
@@ -67,5 +67,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
     {
         $this->runner->runTasks();
         $this->scheduler->scheduleTasks();
+
+        return 0;
     }
 }
diff --git a/src/Command/ScheduleSystemTasksCommand.php b/src/Command/ScheduleSystemTasksCommand.php
index 2aae4ed..fda9c80 100644
--- a/src/Command/ScheduleSystemTasksCommand.php
+++ b/src/Command/ScheduleSystemTasksCommand.php
@@ -108,6 +108,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $output->writeln('');
         $output->writeln('System-tasks successfully scheduled');
+
+        return 0;
     }
 
     /**
diff --git a/src/Command/ScheduleTaskCommand.php b/src/Command/ScheduleTaskCommand.php
index 522dbc2..f6931c5 100644
--- a/src/Command/ScheduleTaskCommand.php
+++ b/src/Command/ScheduleTaskCommand.php
@@ -94,5 +94,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         }
 
         $taskBuilder->schedule();
+
+        return 0;
     }
 }
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index cd584ef..5d521c4 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -11,6 +11,7 @@
 
 namespace Task\TaskBundle\DependencyInjection;
 
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
@@ -37,9 +38,16 @@ public function __construct(array $lockingStorageAliases)
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
+        $treeBuilder = new TreeBuilder('task');
 
-        $treeBuilder->root('task')
+        if (method_exists($treeBuilder, 'getRootNode')) {
+            $rootNode = $treeBuilder->getRootNode();
+        } else {
+            // BC layer for symfony/config 4.1 and older
+            $rootNode = $treeBuilder->root('task');
+        }
+
+        $rootNode
             ->children()
                 ->enumNode('storage')->values(['array', 'doctrine'])->defaultValue('doctrine')->end()
                 ->arrayNode('adapters')
diff --git a/src/Executor/ExecutionProcessFactory.php b/src/Executor/ExecutionProcessFactory.php
index e49fb7b..b463837 100644
--- a/src/Executor/ExecutionProcessFactory.php
+++ b/src/Executor/ExecutionProcessFactory.php
@@ -45,8 +45,14 @@ public function __construct($consolePath, $processTimeout, $environment)
      */
     public function create($uuid)
     {
-        return $process = (new Process(
-            implode(' ', [$this->consolePath, 'task:execute', $uuid, '--env=' . $this->environment])
-        ))->setTimeout($this->processTimeout);
+        $command = implode(' ', [$this->consolePath, 'task:execute', $uuid, '--env=' . $this->environment]);
+
+        if (method_exists(Process::class, 'fromShellCommandline')) {
+            $process = Process::fromShellCommandline($command);
+        } else {
+            $process = new Process($command);
+        }
+
+        return $process->setTimeout($this->processTimeout);
     }
 }