diff --git a/kms.php b/kms.php
index 0f3ac26..8d11187 100755
--- a/kms.php
+++ b/kms.php
@@ -1,9 +1,7 @@
 #!/usr/bin/env php8
 <?php
 
-# TODO: add PORT option
-
-$version = 'v1.2.2';
+$VERSION = 'v1.2.2';
 
 require_once './src/Daemon.php';
 require_once './src/Logger.php';
@@ -42,11 +40,20 @@ pcntl_signal(SIGINT, function() { // receive SIGINT signal
     subExit($nginx['pidFile'], $phpFpm['pidFile'], $vlmcsd['pidFile']);
 });
 
+$KMS_PORT = 1688; // kms expose port -> only in message output
+if (sizeof(getopt('', ['port:'])) == 1) { // port option
+    $KMS_PORT = getopt('', ['port:'])['port'];
+    if (is_array($KMS_PORT)) {
+        $KMS_PORT = end($KMS_PORT);
+    }
+}
+
+
 if (in_array('--debug', $argv)) { // enter debug mode
     logging::$logLevel = logging::DEBUG;
 }
 
-logging::info('Loading kms-server (' . $version . ')');
+logging::info('Loading kms-server (' . $VERSION . ')');
 new Process($nginx['command']);
 logging::info('Start nginx server...OK');
 new Process($phpFpm['command']);
diff --git a/src/Basis.php b/src/Basis.php
index 85cfa25..b01e58b 100644
--- a/src/Basis.php
+++ b/src/Basis.php
@@ -64,6 +64,14 @@ function getHost(): string {
     return (isHost($host)) ? $host : 'KMS_HOST';
 }
 
+function getPort(): int {
+    // TODO: check env
+
+    echo 'KMS_PORT -> ' . getenv("KMS_PORT");
+
+    return 1688;
+}
+
 function officeInfo(): array { // office dir and kms key for different version
     return array(
         '2010' => ['Office14', 'VYBBJ-TRJPB-QFQRF-QFT4D-H3GVB'],
diff --git a/src/Route.php b/src/Route.php
index 5e65420..65c5246 100644
--- a/src/Route.php
+++ b/src/Route.php
@@ -5,11 +5,8 @@ require_once 'Check.php';
 require_once 'KmsCli.php';
 require_once 'KmsWeb.php';
 
-// TODO: get kms port from env
-//$kmsPort = 1688;
-$kmsPort = 1689;
-
 $kmsHost = getHost(); // kms server address
+$kmsPort = getPort(); // kms server port
 $url = $_SERVER['DOCUMENT_URI']; // request url
 $isCli = ($_GET['cli'] == 'true'); // shell or web browser