diff --git a/src/Communication/Cli/ClearCacheCommand.php b/src/Communication/Cli/ClearCacheCommand.php
index 53ae6e9..5eaefb4 100644
--- a/src/Communication/Cli/ClearCacheCommand.php
+++ b/src/Communication/Cli/ClearCacheCommand.php
@@ -42,7 +42,7 @@ public function configure(): void
             ->setDescription('Clear cache pools');
     }
 
-    public function execute(InputInterface $input, OutputInterface $output)
+    public function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);