diff --git a/Classes/Command/ImportDestinationDataViaAllConfigruationsCommand.php b/Classes/Command/ImportDestinationDataViaAllConfigruationsCommand.php
index c7f3e6a..5fa8e0b 100644
--- a/Classes/Command/ImportDestinationDataViaAllConfigruationsCommand.php
+++ b/Classes/Command/ImportDestinationDataViaAllConfigruationsCommand.php
@@ -26,7 +26,7 @@ class ImportDestinationDataViaAllConfigruationsCommand extends Command
         $this->setHelp('Destination Data Events are imported from all configuration records.');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         Bootstrap::initializeBackendAuthentication();
 
diff --git a/Classes/Command/ImportDestinationDataViaConfigruationCommand.php b/Classes/Command/ImportDestinationDataViaConfigruationCommand.php
index 412f6fd..a81cf63 100644
--- a/Classes/Command/ImportDestinationDataViaConfigruationCommand.php
+++ b/Classes/Command/ImportDestinationDataViaConfigruationCommand.php
@@ -34,7 +34,7 @@ class ImportDestinationDataViaConfigruationCommand extends Command
         );
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         Bootstrap::initializeBackendAuthentication();
 
diff --git a/Classes/Command/RemoveAllCommand.php b/Classes/Command/RemoveAllCommand.php
index f1e69ab..7c1e65e 100644
--- a/Classes/Command/RemoveAllCommand.php
+++ b/Classes/Command/RemoveAllCommand.php
@@ -24,7 +24,7 @@ class RemoveAllCommand extends Command
         $this->setHelp('All events and associated data will be removed.');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         Bootstrap::initializeBackendAuthentication();
         $this->cleanupService->deleteAllData();
diff --git a/Classes/Command/RemovePastCommand.php b/Classes/Command/RemovePastCommand.php
index 76377e3..0481ec9 100644
--- a/Classes/Command/RemovePastCommand.php
+++ b/Classes/Command/RemovePastCommand.php
@@ -24,7 +24,7 @@ class RemovePastCommand extends Command
         $this->setHelp('Past dates are removed, together with events that do not have any left dates.');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         Bootstrap::initializeBackendAuthentication();
 
diff --git a/composer.json b/composer.json
index ab018da..16c9ec2 100644
--- a/composer.json
+++ b/composer.json
@@ -20,6 +20,8 @@
     ],
     "require": {
         "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "symfony/console": "^6.4 || ^7.0",
+        "symfony/dependency-injection": "^6.4 || ^7.0",
         "typo3/cms-core": "^12.4",
         "typo3/cms-extbase": "^12.4",
         "typo3/cms-filelist": "^12.4",