diff --git a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
index f84054c..9fd1e4d 100644
--- a/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
+++ b/core/modules/ckeditor/src/Plugin/Editor/CKEditor.php
@@ -191,12 +191,18 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     // settings to be updated accordingly.
     // Get a list of all external plugins and their corresponding files.
     $plugins = array_keys($this->ckeditorPluginManager->getDefinitions());
+    // Get the required asset libraries for all CKEditor plugins.
+    $libraries = array(
+        'ckeditor/drupal.ckeditor',
+    );
     $all_external_plugins = array();
     foreach ($plugins as $plugin_id) {
       $plugin = $this->ckeditorPluginManager->createInstance($plugin_id);
       if (!$plugin->isInternal()) {
         $all_external_plugins[$plugin_id] = $plugin->getFile();
       }
+      $additional_libraries = array_diff($plugin->getLibraries($editor), $libraries);
+      $libraries = array_merge($libraries, $additional_libraries);
     }
     // Get a list of all buttons that are provided by all plugins.
     $all_buttons = array_reduce($this->ckeditorPluginManager->getButtons(), function($result, $item) {
@@ -229,6 +235,7 @@ public function settingsForm(array $form, FormStateInterface $form_state, Editor
     $form['hidden_ckeditor'] = array(
       '#markup' => '<div id="ckeditor-hidden" class="hidden"></div>',
       '#attached' => array(
+        'library' => $libraries,
         'drupalSettings' => ['ckeditor' => ['hiddenCKEditorConfig' => $config]],
       ),
     );