diff --git src/Form/TurnstileAdminSettingsForm.php src/Form/TurnstileAdminSettingsForm.php
index 21ebcef..6e5ac83 100644
--- src/Form/TurnstileAdminSettingsForm.php
+++ src/Form/TurnstileAdminSettingsForm.php
@@ -2,15 +2,44 @@
 
 namespace Drupal\turnstile\Form;
 
+use Drupal\Core\Cache\CacheTagsInvalidatorInterface;
+use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Form\ConfigFormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Configure Turnstile settings for this site.
  */
 class TurnstileAdminSettingsForm extends ConfigFormBase {
 
+  /**
+   * The cache tags invalidator service.
+   *
+   * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface
+   */
+  protected $cacheTagsInvalidator;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(ConfigFactoryInterface $config_factory, CacheTagsInvalidatorInterface $cache_tags_invalidator) {
+    parent::__construct($config_factory);
+
+    $this->cacheTagsInvalidator = $cache_tags_invalidator;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('config.factory'),
+      $container->get('cache_tags.invalidator'),
+    );
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -184,6 +213,8 @@ class TurnstileAdminSettingsForm extends ConfigFormBase {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
+    $this->cacheTagsInvalidator->invalidateTags(['library_info']);
+
     $config = $this->config('turnstile.settings');
     $config
       ->set('site_key', $form_state->getValue('turnstile_site_key'))
diff --git src/Turnstile/Turnstile.php src/Turnstile/Turnstile.php
index 4940e48..e2a6524 100644
--- src/Turnstile/Turnstile.php
+++ src/Turnstile/Turnstile.php
@@ -106,6 +106,7 @@ class Turnstile {
   public function getWidget($validation_function) {
     // Add the Turnstile Ajax Commands library.
     $widget['form']['#attached']['library'][] = 'turnstile/turnstile.ajax';
+    $widget['form']['#cache']['tags'][] = 'library_info';
 
     // Captcha requires TRUE to be returned in solution.
     $widget['solution'] = TRUE;
diff --git turnstile.libraries.yml turnstile.libraries.yml
index e7d8aa6..6825242 100644
--- turnstile.libraries.yml
+++ turnstile.libraries.yml
@@ -6,4 +6,5 @@ turnstile.ajax:
     turnstile.ajax.js: {}
   dependencies:
     - core/jquery
-    - core/drupal.ajax
\ No newline at end of file
+    - core/drupal.ajax
+    - turnstile/turnstile
diff --git turnstile.module turnstile.module
index eca4c47..e68990e 100644
--- turnstile.module
+++ turnstile.module
@@ -6,7 +6,6 @@
  */
 
 use Drupal\Core\Routing\RouteMatchInterface;
-use Drupal\Core\Url;
 use Drupal\turnstile\Turnstile\Drupal8Post;
 use Drupal\turnstile\Turnstile\Turnstile;
 
@@ -43,25 +42,6 @@ function turnstile_captcha($op, $captcha_type = '') {
 
           $turnstile = new Turnstile($turnstile_site_key, $turnstile_secret_key, $attributes);
           $captcha = $turnstile->getWidget('turnstile_captcha_validation');
-
-          $turnstile_src = $config->get('turnstile_src');
-          $captcha['form']['turnstile_widget']['#attached'] = [
-            'html_head' => [
-              [
-                [
-                  '#tag' => 'script',
-                  '#attributes' => [
-                    'src' => Url::fromUri($turnstile_src, [
-                      'absolute' => TRUE,
-                    ])->toString(),
-                    'async' => TRUE,
-                    'defer' => TRUE,
-                  ],
-                ],
-                'turnstile_api',
-              ],
-            ],
-          ];
         }
         else {
           // Fallback to Math captcha as Turnstile is not configured.
@@ -75,6 +55,18 @@ function turnstile_captcha($op, $captcha_type = '') {
   }
 }
 
+/**
+ * Implements hook_library_info_build().
+ */
+function turnstile_library_info_build() {
+  $config = \Drupal::config('turnstile.settings');
+  $turnstile_src = $config->get('turnstile_src');
+
+  $libraries['turnstile']['js'][$turnstile_src] = [];
+
+  return $libraries;
+}
+
 /**
  * CAPTCHA Callback; Validates the Turnstile code.
  */