diff --git a/Dockerfile b/Dockerfile
index 593bcb0..d19e910 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,7 +30,7 @@ COPY . /asset/kms-server/
 RUN mkdir -p /asset/etc/ && mv /asset/kms-server/nginx/ /asset/etc/
 
 FROM alpine:3.16
-RUN apk add --no-cache nginx php8 php8-fpm php8-iconv php8-pcntl
+RUN apk add --no-cache nginx php8 php8-fpm php8-iconv php8-pcntl php8-posix
 COPY --from=asset /asset/ /
 EXPOSE 1688/tcp 1689/tcp
 WORKDIR /kms-server/
diff --git a/main.php b/main.php
index 6932346..8aab9cd 100644
--- a/main.php
+++ b/main.php
@@ -1,15 +1,11 @@
 <?php
 
-$version = 'dev';
+$version = 'v1.2.0-rc2';
 
 require_once './src/Daemon.php';
 require_once './src/Logger.php';
 require_once './src/Process.php';
 
-if (in_array('--debug', $argv)) { // debug mode
-    logging::$logLevel = logging::DEBUG;
-}
-
 $nginx = array(
     'name' => 'nginx',
     'command' => ['/usr/sbin/nginx'],
@@ -28,13 +24,26 @@ $vlmcsd = array(
     'pidFile' => '/run/vlmcsd.pid',
 );
 
-logging::info('Loading kms-server (' . $version . ')');
-
 declare(ticks = 1);
 pcntl_signal(SIGCHLD, function() { // receive SIGCHLD signal
     pcntl_wait($status, WNOHANG); // avoid zombie process
 });
+pcntl_signal(SIGTERM, function() { // receive SIGTERM signal
+    global $nginx, $phpFpm, $vlmcsd;
+    logging::info('Get SIGTERM -> exit');
+    subExit($nginx['pidFile'], $phpFpm['pidFile'], $vlmcsd['pidFile']);
+});
+pcntl_signal(SIGINT, function() { // receive SIGINT signal
+    global $nginx, $phpFpm, $vlmcsd;
+    logging::info('Get SIGINT -> exit');
+    subExit($nginx['pidFile'], $phpFpm['pidFile'], $vlmcsd['pidFile']);
+});
 
+if (in_array('--debug', $argv)) { // enter debug mode
+    logging::$logLevel = logging::DEBUG;
+}
+
+logging::info('Loading kms-server (' . $version . ')');
 new Process($nginx['command']);
 logging::info('Start nginx server...OK');
 new Process($phpFpm['command']);
@@ -42,9 +51,11 @@ logging::info('Start php-fpm server...OK');
 new Process($vlmcsd['command']);
 logging::info('Start vlmcsd server...OK');
 
-logging::info('Enter the daemon process');
-while (true) {
-    msSleep(5000); // sleep 5s
+logging::info('Enter daemon process');
+while (true) { // start daemon
+    for ($i = 0; $i < 500; $i++) { // sleep 5s
+        msDelay(10); // return main loop every 10ms
+    }
     daemon($nginx);
     daemon($phpFpm);
     daemon($vlmcsd);
diff --git a/src/Daemon.php b/src/Daemon.php
index c8f61aa..f223195 100644
--- a/src/Daemon.php
+++ b/src/Daemon.php
@@ -1,9 +1,11 @@
 <?php
 
+use JetBrains\PhpStorm\NoReturn;
+
 require_once 'Logger.php';
 require_once 'Process.php';
 
-function msSleep(int $ms): void { // sleep for xxx ms
+function msDelay(int $ms): void { // delay for xxx ms
     for ($i = 0; $i < $ms; $i++) {
         usleep(1000); // split multiple times (avoid SIGCHLD signal)
     }
@@ -45,3 +47,19 @@ function daemon(array $info): void {
         logging::info('Restart ' . $info['name'] . ' success');
     }
 }
+
+#[NoReturn] function subExit(string $nginxPid, string $phpFpmPid, string $vlmcsdPid): void {
+    $nginxPid = getPid($nginxPid);
+    logging::info("Sending kill signal to nginx ($nginxPid)");
+    posix_kill($nginxPid, SIGTERM);
+    $phpFpmPid = getPid($phpFpmPid);
+    logging::info("Sending kill signal to php-fpm ($phpFpmPid)");
+    posix_kill($phpFpmPid, SIGTERM);
+    $vlmcsdPid = getPid($vlmcsdPid);
+    logging::info("Sending kill signal to vlmcsd ($vlmcsdPid)");
+    posix_kill($vlmcsdPid, SIGTERM);
+    logging::info('Waiting sub process exit...');
+    pcntl_wait($status); // wait all process exit
+    logging::info('All process exit, Goodbye!');
+    exit;
+}