diff --git a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
index b97552369dad9ea1bef90e43db21b5b304429d31..159a0a1965b0b00175e542ed290a4be7ffe6bda7 100644
--- a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
+++ b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
@@ -225,7 +225,7 @@ public static function process($element, FormStateInterface $form_state, $form)
       '#type' => 'textfield',
       '#default_value' => isset($item['alt']) ? $item['alt'] : '',
       '#description' => t('This text will be used by screen readers, search engines, or when the image cannot be loaded.'),
-      // @see http://www.gawds.org/show.php?contentid=28
+      // @see https://drupal.org/node/465106#alt-text
       '#maxlength' => 512,
       '#weight' => -12,
       '#access' => (bool) $item['fids'] && $element['#alt_field'],