diff --git a/README.md b/README.md
index 40db015..0719cf1 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
-LiteSpeed Cache for Drupal 8+
+LiteSpeed Cache for Drupal 9+
 ============================
 
-Drupal 8/9 is significantly changed from Drupal 7. They have converted from procedural programming to object-oriented programming. Drupal 8 has a built-in page cache (for static content) and a dynamic page cache for logged in users. The latter basically works as a reverse proxy written in PHP. The built-in proxy is good if you have no other options, however, with the LiteSpeed Cache plugin you will see a great improvement in performance for your Drupal 8 site.
+Drupal 9+ is significantly changed from Drupal 7. They have converted from procedural programming to object-oriented programming. Drupal 9+ has a built-in page cache (for static content) and a dynamic page cache for logged in users. The latter basically works as a reverse proxy written in PHP. The built-in proxy is good if you have no other options, however, with the LiteSpeed Cache plugin you will see a great improvement in performance for your Drupal 9+ site.
 
 See https://www.litespeedtech.com/products/cache-plugins for more information.
 
@@ -9,7 +9,7 @@ See https://www.litespeedtech.com/products/cache-plugins for more information.
 
 Prerequisites
 -------------
-This version of LiteSpeed Cache requires Drupal 8.xx or later and LiteSpeed Web Server (LSWS) 5.2.3 or later.
+This version of LiteSpeed Cache requires Drupal 9 or later and LiteSpeed Web Server (LSWS) 5.2.3 or later.
 
 
 
@@ -36,9 +36,11 @@ If you use Composer to manage dependencies, require the module in your project `
 Enable LiteSpeedCache using rewrite rules
 -------------
 
-    <IfModule LiteSpeed>
-	CacheLookup on
-    </IfModule>
+```
+<IfModule LiteSpeed>
+  CacheLookup on
+</IfModule>
+```
 
 Install Plugin
 -------------
diff --git a/lite_speed_cache.info.yml b/lite_speed_cache.info.yml
index cc44c11..516cce0 100644
--- a/lite_speed_cache.info.yml
+++ b/lite_speed_cache.info.yml
@@ -3,11 +3,4 @@ type: module
 description: 'Caches pages for any user, handling dynamic content correctly.'
 package: Core
 configure: lite_speed_cache.form
-core_version_requirement: ^8 || ^9
-# version: VERSION
-
-# Information added by Drupal.org packaging script on 2017-12-06
-version: '8.4.3'
-core: '8.x'
-project: 'drupal'
-datestamp: 1512600826
+core_version_requirement: ^9 || ^10 || ^11
diff --git a/lite_speed_cache.install b/lite_speed_cache.install
index 78436c1..695c1b4 100644
--- a/lite_speed_cache.install
+++ b/lite_speed_cache.install
@@ -5,8 +5,6 @@
  * Installation functions for LiteSpeed Cache module.
  */
 
-use Drupal\user\RoleInterface;
-
 /**
  * Implements hook_install().
  */
diff --git a/lite_speed_cache.module b/lite_speed_cache.module
index c8fdfe0..4de19cc 100644
--- a/lite_speed_cache.module
+++ b/lite_speed_cache.module
@@ -30,13 +30,3 @@ function lite_speed_cache_help($route_name, RouteMatchInterface $route_match) {
             return $output;
     }
 }
-
-
-/**
- * Implements hook_user_login($account).
- */
-
-
-function lite_speed_cache_user_login($account) {
-    $reqTemp = \Drupal::request();
-}
\ No newline at end of file
diff --git a/src/Cache/LSCacheTagsInvalidator.php b/src/Cache/LSCacheTagsInvalidator.php
index 7986f54..7713aa8 100644
--- a/src/Cache/LSCacheTagsInvalidator.php
+++ b/src/Cache/LSCacheTagsInvalidator.php
@@ -8,7 +8,6 @@
 
 namespace Drupal\lite_speed_cache\Cache;
 use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
-use Symfony\Component\HttpFoundation\RequestStack;
 
 
 class LSCacheTagsInvalidator implements CacheTagsInvalidatorInterface {
diff --git a/src/EventSubscriber/LiteSpeedCacheSubscriber.php b/src/EventSubscriber/LiteSpeedCacheSubscriber.php
index c8c2e14..ebc2bed 100644
--- a/src/EventSubscriber/LiteSpeedCacheSubscriber.php
+++ b/src/EventSubscriber/LiteSpeedCacheSubscriber.php
@@ -9,14 +9,13 @@
 namespace Drupal\lite_speed_cache\EventSubscriber;
 
 use Drupal\Core\Cache\Cache;
-use Drupal\Core\Cache\CacheableMetadata;
 use Drupal\Core\Cache\CacheableResponseInterface;
 use Drupal\Core\PageCache\RequestPolicyInterface;
 use Drupal\Core\PageCache\ResponsePolicyInterface;
 use Drupal\Core\Render\RenderCacheInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
-use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\Event\ResponseEvent;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
 use \Drupal\lite_speed_cache\Cache\LSCacheTagsInvalidator;
 use \Drupal\lite_speed_cache\Form\LSCacheForm;
@@ -122,10 +121,10 @@ public function __construct(RequestPolicyInterface $request_policy, ResponsePoli
     /**
      * Sets a response in case of a Dynamic Page Cache hit.
      *
-     * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
+     * @param \Symfony\Component\HttpKernel\Event\RequestEvent $event
      *   The event to process.
      */
-    public function onRouteMatch(GetResponseEvent $event) {
+    public function onRouteMatch(RequestEvent $event) {
 
         // Don't cache the response if the Dynamic Page Cache request policies are
         // not met. Store the result in a static keyed by current request, so that
@@ -160,10 +159,10 @@ private function filterTags($tags){
     /**
      * Stores a response in case of a Dynamic Page Cache miss, if cacheable.
      *
-     * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
+     * @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
      *   The event to process.
      */
-    public function onResponse(FilterResponseEvent $event){
+    public function onResponse(ResponseEvent $event){
         $response = $event->getResponse();
         $request = $event->getRequest();
 
@@ -194,7 +193,7 @@ public function onResponse(FilterResponseEvent $event){
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'LS Cache Purged!');
             }
-            $response->headers->set(LiteSpeedCacheSubscriber::PURGEHEADER, $commonTag);
+            $response->headers->set(self::PURGEHEADER, $commonTag);
         } else {
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'No Purge!');
@@ -208,7 +207,7 @@ public function onResponse(FilterResponseEvent $event){
                 $response->headers->set(self::STATUSHEADER, 'LS Cache Purged!');
             }
             $tags = implode(",", LSCacheTagsInvalidator::$tags);
-            $response->headers->set(LiteSpeedCacheSubscriber::PURGEHEADER, $tags);
+            $response->headers->set(self::PURGEHEADER, $tags);
         } else {
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'No Purge!');
@@ -221,7 +220,7 @@ public function onResponse(FilterResponseEvent $event){
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'LS Cache Purged!');
             }
-            $response->headers->set(LiteSpeedCacheSubscriber::PURGEHEADER, "*");
+            $response->headers->set(self::PURGEHEADER, "*");
         } else {
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'No Purge');
@@ -234,13 +233,13 @@ public function onResponse(FilterResponseEvent $event){
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'LS Cache Purged!');
             }
-            $response->headers->set(LiteSpeedCacheSubscriber::PURGEHEADER, $commonTag);
+            $response->headers->set(self::PURGEHEADER, $commonTag);
         } else {
             if($lsCacheDebug=='0' or $lsCacheDebug == 'On') {
                 $response->headers->set(self::STATUSHEADER, 'No Purge');
             }
         }
-        
+
         // wade:start
         // Check if it needs to crawler the sitemap
         if (LSCacheForm::$crawlerTheSite) {
@@ -250,7 +249,6 @@ public function onResponse(FilterResponseEvent $event){
             }
         }
         // wade:end
-        
 
         if ($request->cookies->has(session_name())) {
 
@@ -270,18 +268,15 @@ public function onResponse(FilterResponseEvent $event){
                 return;
             }
 
-
             $request = $event->getRequest();
             if (!isset($this->requestPolicyResults[$request])) {
                 return;
             }
 
-
             if ($this->requestPolicyResults[$request] === RequestPolicyInterface::DENY || $this->responsePolicy->check($response, $request) === ResponsePolicyInterface::DENY) {
                     return;
             }
 
-
             if($cacheStatus=='0' or $cacheStatus == 'On')  {
                 $response->headers->set('X-LiteSpeed-Cache-Control', 'private, max-age='.$maxAgePrivate);
                 $tags = $response->getCacheableMetadata()->getCacheTags();
@@ -291,7 +286,6 @@ public function onResponse(FilterResponseEvent $event){
                 $response->headers->set('X-LiteSpeed-Tag', $tags);
             }
 
-
         }else {
                 $cookies = $request->cookies;
                 if($cookies->has('_lscache_vary')) {
@@ -304,7 +298,6 @@ public function onResponse(FilterResponseEvent $event){
 
     }
 
-
     /**
      * Whether the given response should be cached by LiteSpeed Page Cache.
      *
@@ -339,8 +332,6 @@ protected function shouldCacheResponse(CacheableResponseInterface $response) {
         return TRUE;
     }
 
-
-    /**
     /**
      * {@inheritdoc}
      */
diff --git a/src/Form/LSCacheForm.php b/src/Form/LSCacheForm.php
index f49baba..aebb67d 100644
--- a/src/Form/LSCacheForm.php
+++ b/src/Form/LSCacheForm.php
@@ -18,19 +18,16 @@ class LSCacheForm extends ConfigFormBase
     /**
      * Purge all status variable
      */
-
     public static $purgeALL;
 
     /**
      * Purge this site status variable
      */
-
     public static $purgeThisSite;
-        
+
     /**
     * crawlear this site variable
     */
-
     public static $crawlerTheSite;
 
     /**
@@ -49,7 +46,6 @@ protected function getEditableConfigNames() {
         ];
     }
 
-
     /**
      * {@inheritdoc}
      */
@@ -105,22 +101,8 @@ public function buildForm(array $form, FormStateInterface $form_state) {
             '#description' => $this->t('Weather to send or not the debug headers!'),
         );
 
-
         $options = ['On','Off'];
 
-        /*
-
-        $form['cache_settings']['esi_on'] = array(
-            '#type' => 'select',
-            '#title' => $this->t('ESI'),
-            '#options' => $options,
-            '#default_value' => $config->get('lite_speed_cache.esi_on'),
-            '#description' => $this->t('Turn ESI On or Off for Hole Punching! Keep it disabled if you are on OpenLiteSpeed.'),
-        );
-
-        */
-
-
         // max_age field.
         $form['cache_settings']['max_age'] = array(
             '#type' => 'textfield',
@@ -129,18 +111,6 @@ public function buildForm(array $form, FormStateInterface $form_state) {
             '#description' => $this->t('Amount of time for which page should be cached by LiteSpeed Webserver public cache (Seconds).'),
         );
 
-        /*
-
-        // max_age field.
-        $form['cache_settings']['max_age_private'] = array(
-            '#type' => 'textfield',
-            '#title' => $this->t('Max age private'),
-            '#default_value' => $config->get('lite_speed_cache.max_age_private'),
-            '#description' => $this->t('Amount of time for which page should be cached by LiteSpeed Webserver private cache.'),
-        );
-
-        */
-
         return $form;
     }
 
@@ -165,7 +135,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $config->set('lite_speed_cache.cache_status', $form_state->getValue('cache_status'));
         $config->set('lite_speed_cache.debug', $form_state->getValue('debug'));
         $config->save();
-        
+
         // Prevent gzip cause broken website layout
         $config = $this->config('system.performance');
         $config->set('css.preprocess', '0');
diff --git a/src/StackMiddleware/LiteSpeedCache.php b/src/StackMiddleware/LiteSpeedCache.php
index 92a8410..8dbf374 100644
--- a/src/StackMiddleware/LiteSpeedCache.php
+++ b/src/StackMiddleware/LiteSpeedCache.php
@@ -8,13 +8,10 @@
 
 namespace Drupal\lite_speed_cache\StackMiddleware;
 
-use Drupal\Core\Cache\Cache;
 use Drupal\Core\Cache\CacheableResponseInterface;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\PageCache\RequestPolicyInterface;
 use Drupal\Core\PageCache\ResponsePolicyInterface;
-use Drupal\Core\Site\Settings;
-use Drupal\user\Authentication\Provider\Cookie;
 use Symfony\Component\HttpFoundation\BinaryFileResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -102,14 +99,14 @@ private function filterTags($tags){
      * {@inheritdoc}
      */
 
-    public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
+    public function handle(Request $request, $type = self::MAIN_REQUEST, $catch = TRUE):Response {
 
 
 
         if( (isset($_SERVER['X-LSCACHE']) && $_SERVER['X-LSCACHE']) || (isset($_SERVER['HTTP_X_LSCACHE']) && $_SERVER['HTTP_X_LSCACHE']) ){
 
             // Only allow page caching on master request.
-            if ($type === static::MASTER_REQUEST && $this->requestPolicy->check($request) === RequestPolicyInterface::ALLOW) {
+            if ($type === static::MAIN_REQUEST && $this->requestPolicy->check($request) === RequestPolicyInterface::ALLOW) {
                 $response = $this->lookup($request, $type, $catch);
             }
             else {
@@ -132,7 +129,7 @@ public function handle(Request $request, $type = self::MASTER_REQUEST, $catch =
      * @param \Symfony\Component\HttpFoundation\Request $request
      *   A request object.
      * @param int $type
-     *   The type of the request (one of HttpKernelInterface::MASTER_REQUEST or
+     *   The type of the request (one of HttpKernelInterface::MAIN_REQUEST or
      *   HttpKernelInterface::SUB_REQUEST)
      * @param bool $catch
      *   Whether to catch exceptions or not
@@ -140,7 +137,7 @@ public function handle(Request $request, $type = self::MASTER_REQUEST, $catch =
      * @returns \Symfony\Component\HttpFoundation\Response $response
      *   A response object.
      */
-    protected function pass(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
+    protected function pass(Request $request, $type = self::MAIN_REQUEST, $catch = TRUE) {
         return $this->httpKernel->handle($request, $type, $catch);
     }
 
@@ -150,7 +147,7 @@ protected function pass(Request $request, $type = self::MASTER_REQUEST, $catch =
      * @param \Symfony\Component\HttpFoundation\Request $request
      *   A request object.
      * @param int $type
-     *   The type of the request (one of HttpKernelInterface::MASTER_REQUEST or
+     *   The type of the request (one of HttpKernelInterface::MAIN_REQUEST or
      *   HttpKernelInterface::SUB_REQUEST)
      * @param bool $catch
      *   Whether to catch exceptions or not
@@ -158,7 +155,7 @@ protected function pass(Request $request, $type = self::MASTER_REQUEST, $catch =
      * @returns \Symfony\Component\HttpFoundation\Response $response
      *   A response object.
      */
-    protected function lookup(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
+    protected function lookup(Request $request, $type = self::MAIN_REQUEST, $catch = TRUE) {
 
 
         // fetch request from backend and set cache headers
@@ -218,7 +215,7 @@ protected function lookup(Request $request, $type = self::MASTER_REQUEST, $catch
      * @param \Symfony\Component\HttpFoundation\Request $request
      *   A request object.
      * @param int $type
-     *   The type of the request (one of HttpKernelInterface::MASTER_REQUEST or
+     *   The type of the request (one of HttpKernelInterface::MAIN_REQUEST or
      *   HttpKernelInterface::SUB_REQUEST)
      * @param bool $catch
      *   Whether to catch exceptions or not
@@ -226,7 +223,7 @@ protected function lookup(Request $request, $type = self::MASTER_REQUEST, $catch
      * @returns \Symfony\Component\HttpFoundation\Response $response
      *   A response object.
      */
-    protected function fetch(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
+    protected function fetch(Request $request, $type = self::MAIN_REQUEST, $catch = TRUE) {
         /** @var \Symfony\Component\HttpFoundation\Response $response */
         $response = $this->httpKernel->handle($request, $type, $catch);
 
@@ -296,4 +293,4 @@ protected function checkCacheAbility(Request $request, Response $response) {
     }
 
 
-}
\ No newline at end of file
+}