diff --git a/Server/ServerManager.php b/Server/ServerManager.php
index 20f30c63..058eff8c 100644
--- a/Server/ServerManager.php
+++ b/Server/ServerManager.php
@@ -309,7 +309,7 @@ class ServerManager
 	private function portIsAlready($port): bool|string
 	{
 		if (!Kiri::getPlatform()->isLinux()) {
-			exec('lsof -i :' . $port . ' | grep -i "LISTEN" | awk "{print $2}"', $output);
+			exec("lsof -i :" . $port . " | grep -i 'LISTEN' | awk '{print $2}'", $output);
 			if (empty($output)) return false;
 			$output = explode(PHP_EOL, $output[0]);
 			return $output[0];