diff --git a/src/Container/Container.php b/src/Container/Container.php
index 7b569b9..cc8bbec 100644
--- a/src/Container/Container.php
+++ b/src/Container/Container.php
@@ -117,6 +117,9 @@ public function withHealthCheckCommand(string $command, int $healthCheckInterval
         return $this;
     }
 
+    /**
+     * @param array<string> $cmd
+     */
     public function withCmd(array $cmd): self
     {
         $this->cmd = $cmd;