diff --git a/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php b/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
index b0878f8aa65870df204cae629e9ea4df7a114226..2b4ffaaab883faa7036feaa94f43b75753ba5617 100644
--- a/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemPoweredByBlock.php
@@ -24,7 +24,7 @@ class SystemPoweredByBlock extends BlockBase {
    * {@inheritdoc}
    */
   public function build() {
-    return array('#markup' => '<span>' . t('Powered by <a href="@poweredby">Drupal</a>', array('@poweredby' => 'http://drupal.org')) . '</span>');
+    return array('#markup' => '<span>' . t('Powered by <a href="@poweredby">Drupal</a>', array('@poweredby' => 'https://drupal.org')) . '</span>');
   }