diff --git a/customfilter.module b/customfilter.module
index b60b70e..563a058 100644
--- a/customfilter.module
+++ b/customfilter.module
@@ -4,7 +4,8 @@
  * @file
  * Allows the users with the right permission to define custom filters.
  */
-
+use Drupal\Core\Hook\Attribute\LegacyHook;
+use Drupal\customfilter\Hook\CustomfilterHooks;
 use Drupal\customfilter\Entity\CustomFilter;
 use Drupal\Core\Url;
 use Drupal\Core\Routing\RouteMatchInterface;
@@ -12,32 +13,9 @@ use Drupal\Core\Routing\RouteMatchInterface;
 /**
  * Implements hook_help().
  */
+#[LegacyHook]
 function customfilter_help($route_name, RouteMatchInterface $route_match) {
-  switch ($route_name) {
-    case 'help.page.customfilter':
-      $output = '';
-      $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The <em>customfilter</em> module allows users with the right permission to create custom filters. Those will be available as text format filters to be used in your content.</p>');
-      $output .= '<h3>' . t('Uses') . '</h3>';
-      $output .= '<dl>';
-      $output .= '<dt>' . t('Configure your custom filters and rules:') . '</dt>';
-      $output .= '<dd>' . t('<em>Filters</em> are made of <em>rules</em> and eventually <em>subrules</em>. Configure them on the <a href=":filters">filter administration page</a>.', [':filters' => Url::fromRoute('entity.customfilter.list')->toString()]) . '</dd>';
-      $output .= '<dt>' . t('Use them in your text formats:') . '</dt>';
-      $output .= '<dd>' . t('<em>Custom filters</em> can be used in the text formats to enhance your contents. Enable the filters you made by <a href=":formats">administrating text formats</a>.', [':formats' => Url::fromRoute('filter.admin_overview')->toString()]) . '</dd>';
-      $output .= '</dl>';
-      return $output;
-
-    case 'entity.customfilter.list':
-      $output = '<p>' . t('Custom filter provides the ability for creating user defined filters using regular expressions. Instead of creating filter modules, users can create their own filter for specific site purpose.') . '</p>';
-      $output .= '<p>' . t('A filter is a collection of replacement rules. Each filter will appear in the input format settings page. Click on the filter name to see its replacement rules.') . '</p>';
-      return $output;
-
-    case 'customfilter.rules.add':
-    case 'customfilter.rules.edit':
-    case 'customfilter.rules.add.subrule':
-      $output = '<p>' . t('For more information about the regular expressions syntax, see <a href="http://www.php.net/manual/en/regexp.reference.php">Regular expression details</a>.') . '</p>';
-      return $output;
-  }
+  return \Drupal::service(CustomfilterHooks::class)->help($route_name, $route_match);
 }
 
 /**
@@ -45,20 +23,8 @@ function customfilter_help($route_name, RouteMatchInterface $route_match) {
  *
  * This function add the filters from customfilter.
  */
-function customfilter_filter_info_alter(&$info) {
-  $filters = CustomFilter::getFilters();
-  foreach ($filters as $filter) {
-    $id = 'customfilter_' . $filter->id();
-    $info[$id]['description'] = $filter->getDescription();
-    $info[$id]['weight'] = 0;
-    $info[$id]['status'] = FALSE;
-    $info[$id]['cache'] = $filter->getCache();
-    $info[$id]['settings'] = ['id' => $filter->id()];
-    $info[$id]['id'] = $id;
-    $info[$id]['module'] = 'customfilter';
-    $info[$id]['title'] = $filter->label();
-    $info[$id]['type'] = 2;
-    $info[$id]['class'] = 'Drupal\customfilter\Plugin\Filter\CustomFilterBaseFilter';
-    $info[$id]['provider'] = 'customfilter';
-  }
+#[LegacyHook]
+function customfilter_filter_info_alter(&$info)
+{
+    \Drupal::service(CustomfilterHooks::class)->filterInfoAlter($info);
 }
diff --git a/customfilter.services.yml b/customfilter.services.yml
index ce1f3cb..177f58c 100644
--- a/customfilter.services.yml
+++ b/customfilter.services.yml
@@ -2,3 +2,7 @@ services:
   customfilter.validator:
     class: Drupal\customfilter\CustomFilterValidator
     arguments: ['@plugin.manager.filter', '@entity_type.manager', '@string_translation']
+
+  Drupal\customfilter\Hook\CustomfilterHooks:
+    class: Drupal\customfilter\Hook\CustomfilterHooks
+    autowire: true
diff --git a/src/Hook/CustomfilterHooks.php b/src/Hook/CustomfilterHooks.php
new file mode 100644
index 0000000..74cf1eb
--- /dev/null
+++ b/src/Hook/CustomfilterHooks.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace Drupal\customfilter\Hook;
+
+use Drupal\customfilter\Entity\CustomFilter;
+use Drupal\Core\Url;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Hook\Attribute\Hook;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+/**
+ * Hook implementations for customfilter.
+ */
+class CustomfilterHooks
+{
+    use StringTranslationTrait;
+    /**
+     * Implements hook_help().
+     */
+    #[Hook('help')]
+    public function help($route_name, \Drupal\Core\Routing\RouteMatchInterface $route_match)
+    {
+        switch ($route_name) {
+            case 'help.page.customfilter':
+                $output = '';
+                $output .= '<h3>' . $this->t('About') . '</h3>';
+                $output .= '<p>' . $this->t('The <em>customfilter</em> module allows users with the right permission to create custom filters. Those will be available as text format filters to be used in your content.</p>');
+                $output .= '<h3>' . $this->t('Uses') . '</h3>';
+                $output .= '<dl>';
+                $output .= '<dt>' . $this->t('Configure your custom filters and rules:') . '</dt>';
+                $output .= '<dd>' . $this->t('<em>Filters</em> are made of <em>rules</em> and eventually <em>subrules</em>. Configure them on the <a href=":filters">filter administration page</a>.', [
+                    ':filters' => \Drupal\Core\Url::fromRoute('entity.customfilter.list')->toString(),
+                ]) . '</dd>';
+                $output .= '<dt>' . $this->t('Use them in your text formats:') . '</dt>';
+                $output .= '<dd>' . $this->t('<em>Custom filters</em> can be used in the text formats to enhance your contents. Enable the filters you made by <a href=":formats">administrating text formats</a>.', [
+                    ':formats' => \Drupal\Core\Url::fromRoute('filter.admin_overview')->toString(),
+                ]) . '</dd>';
+                $output .= '</dl>';
+                return $output;
+            case 'entity.customfilter.list':
+                $output = '<p>' . $this->t('Custom filter provides the ability for creating user defined filters using regular expressions. Instead of creating filter modules, users can create their own filter for specific site purpose.') . '</p>';
+                $output .= '<p>' . $this->t('A filter is a collection of replacement rules. Each filter will appear in the input format settings page. Click on the filter name to see its replacement rules.') . '</p>';
+                return $output;
+            case 'customfilter.rules.add':
+            case 'customfilter.rules.edit':
+            case 'customfilter.rules.add.subrule':
+                $output = '<p>' . $this->t('For more information about the regular expressions syntax, see <a href="http://www.php.net/manual/en/regexp.reference.php">Regular expression details</a>.') . '</p>';
+                return $output;
+        }
+    }
+    /**
+     * Implements hook_filter_info_alter().
+     *
+     * This function add the filters from customfilter.
+     */
+    #[Hook('filter_info_alter')]
+    public static function filterInfoAlter(&$info)
+    {
+        $filters = \Drupal\customfilter\Entity\CustomFilter::getFilters();
+        foreach ($filters as $filter) {
+            $id = 'customfilter_' . $filter->id();
+            $info[$id]['description'] = $filter->getDescription();
+            $info[$id]['weight'] = 0;
+            $info[$id]['status'] = FALSE;
+            $info[$id]['cache'] = $filter->getCache();
+            $info[$id]['settings'] = [
+                'id' => $filter->id(),
+            ];
+            $info[$id]['id'] = $id;
+            $info[$id]['module'] = 'customfilter';
+            $info[$id]['title'] = $filter->label();
+            $info[$id]['type'] = 2;
+            $info[$id]['class'] = 'Drupal\customfilter\Plugin\Filter\CustomFilterBaseFilter';
+            $info[$id]['provider'] = 'customfilter';
+        }
+    }
+}