diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 7400017..b7b3b53 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1462,7 +1462,6 @@ function template_preprocess_maintenance_page(&$variables) {
   template_preprocess_page($variables);
 
   // @see system_page_attachments()
-  $variables['#attached']['library'][] = 'core/normalize';
   $variables['#attached']['library'][] = 'system/maintenance';
 }
 
diff --git a/core/modules/system/src/Tests/Theme/ThemeInfoTest.php b/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
index 0b38ea7..595e8d9 100644
--- a/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
+++ b/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
@@ -94,13 +94,13 @@ public function testChanges() {
     $active_theme = $this->themeManager->getActiveTheme();
     // Make sure we are not testing the wrong theme.
     $this->assertEqual('test_theme', $active_theme->getName());
-    $this->assertEqual(['classy/base', 'test_theme/global-styling'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'classy/normalize', 'test_theme/global-styling'], $active_theme->getLibraries());
 
     // @see theme_test_system_info_alter()
     $this->state->set('theme_test.modify_info_files', TRUE);
     drupal_flush_all_caches();
     $active_theme = $this->themeManager->getActiveTheme();
-    $this->assertEqual(['classy/base', 'test_theme/global-styling', 'core/backbone'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'classy/normalize', 'test_theme/global-styling', 'core/backbone'], $active_theme->getLibraries());
   }
 
 }
diff --git a/core/modules/system/system.libraries.yml b/core/modules/system/system.libraries.yml
index b440e15..43113de 100644
--- a/core/modules/system/system.libraries.yml
+++ b/core/modules/system/system.libraries.yml
@@ -6,8 +6,6 @@ base:
       css/system.module.css: { every_page: true, weight: -10, }
     theme:
       css/system.theme.css: { every_page: true, weight: -10 }
-  dependencies:
-    - core/normalize
 
 admin:
   version: VERSION
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 732e27b..26ee0e8 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -520,7 +520,6 @@ function system_filetransfer_info() {
  */
 function system_page_attachments(array &$page) {
   // Ensure the same CSS is loaded in template_preprocess_maintenance_page().
-  $page['#attached']['library'][] = 'core/normalize';
   $page['#attached']['library'][] = 'system/base';
   if (\Drupal::service('router.admin_context')->isAdminRoute()) {
     $page['#attached']['library'][] = 'system/admin';
diff --git a/core/themes/classy/classy.info.yml b/core/themes/classy/classy.info.yml
index 93a5268..bd61ce0 100644
--- a/core/themes/classy/classy.info.yml
+++ b/core/themes/classy/classy.info.yml
@@ -7,3 +7,4 @@ core: 8.x
 
 libraries:
   - classy/base
+  - core/normalize