diff --git a/src/Deblan/Command/CheckCommand.php b/src/Deblan/Command/CheckCommand.php
index 602d2f5..9b915b8 100644
--- a/src/Deblan/Command/CheckCommand.php
+++ b/src/Deblan/Command/CheckCommand.php
@@ -48,9 +48,9 @@ class CheckCommand extends BaseCommand
             ->addArgument('domains', InputArgument::IS_ARRAY | InputArgument::REQUIRED, 'List of domains')
             ->addOption('short', 's', InputOption::VALUE_NONE, 'Simplify the table output')
             ->addOption('no-headers', null, InputOption::VALUE_NONE, 'Remove the table headers')
-            ->addOption('wait', 'w', InputOption::VALUE_REQUIRED, 'Wait between each whois')
+            ->addOption('wait', 'w', InputOption::VALUE_REQUIRED, 'Wait between each whois (in second, default: 0)')
             ->addOption('json', 'j', InputOption::VALUE_NONE, 'Select json as output')
-            ->addOption('table', 't', InputOption::VALUE_NONE, 'Select table as output')
+            ->addOption('table', 't', InputOption::VALUE_NONE, 'Select table as output (default)')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> retrieves the expiration dates of the given domains.