diff --git a/core/includes/common.inc b/core/includes/common.inc
index d18c0c1..f27a4d2 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -1,7 +1,7 @@
 <?php
 
 use Drupal\Component\Utility\Crypt;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Component\Utility\Number;
 use Drupal\Component\Utility\Settings;
 use Drupal\Component\Utility\SortArray;
@@ -3062,7 +3062,7 @@ function drupal_clear_js_cache() {
  * @ingroup php_wrappers
  *
  * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
- *   Use \Drupal\Component\Utility\Json::encode().
+ *   Use \Drupal\Core\Serialization\Json::encode().
  */
 function drupal_json_encode($var) {
   return Json::encode($var);
@@ -3076,7 +3076,7 @@ function drupal_json_encode($var) {
  * @ingroup php_wrappers
  *
  * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
- *   Use \Drupal\Component\Utility\Json::decode().
+ *   Use \Drupal\Core\Serialization\Json::decode().
  */
 function drupal_json_decode($var) {
   return Json::decode($var);
diff --git a/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php b/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
index cdaf1d8..a3b3a42 100644
--- a/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
+++ b/core/lib/Drupal/Core/Asset/JsCollectionRenderer.php
@@ -7,7 +7,7 @@
 namespace Drupal\Core\Asset;
 
 use Drupal\Core\KeyValueStore\StateInterface;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 
 /**
  * Renders JavaScript assets.
diff --git a/core/lib/Drupal/Component/Utility/Json.php b/core/lib/Drupal/Core/Serialization/Json.php
similarity index 92%
rename from core/lib/Drupal/Component/Utility/Json.php
rename to core/lib/Drupal/Core/Serialization/Json.php
index 88e55ae..20427b4 100644
--- a/core/lib/Drupal/Component/Utility/Json.php
+++ b/core/lib/Drupal/Core/Serialization/Json.php
@@ -2,10 +2,10 @@
 
 /**
  * @file
- * Contains \Drupal\Component\Utility\Json.
+ * Contains \Drupal\Core\Serialization\Json.
  */
 
-namespace Drupal\Component\Utility;
+namespace Drupal\Core\Serialization;
 
 /**
  * Provides helpers for dealing with json.
diff --git a/core/lib/Drupal/Core/Utility/LinkGenerator.php b/core/lib/Drupal/Core/Utility/LinkGenerator.php
index 1ebc5bf..70c2bed 100644
--- a/core/lib/Drupal/Core/Utility/LinkGenerator.php
+++ b/core/lib/Drupal/Core/Utility/LinkGenerator.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\Core\Utility;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Component\Utility\String;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Path\AliasManagerInterface;
diff --git a/core/modules/block/lib/Drupal/block/BlockListController.php b/core/modules/block/lib/Drupal/block/BlockListController.php
index 65db261..df1689e 100644
--- a/core/modules/block/lib/Drupal/block/BlockListController.php
+++ b/core/modules/block/lib/Drupal/block/BlockListController.php
@@ -8,7 +8,7 @@
 namespace Drupal\block;
 
 use Drupal\Component\Plugin\PluginManagerInterface;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Component\Utility\String;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Config\Entity\ConfigEntityListController;
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
index ed4b1e2..2527b32 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/Tests/ConfigTranslationUiTest.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\config_translation\Tests;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Config\FileStorage;
 use Drupal\Core\Language\Language;
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationContextualLinksTest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationContextualLinksTest.php
index 4b71a16..c25d480 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationContextualLinksTest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationContextualLinksTest.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\content_translation\Tests;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\node\Entity\NodeType;
 use Drupal\simpletest\WebTestBase;
 
diff --git a/core/modules/contextual/lib/Drupal/contextual/Plugin/views/field/ContextualLinks.php b/core/modules/contextual/lib/Drupal/contextual/Plugin/views/field/ContextualLinks.php
index 2f6004a..fd41e5d 100644
--- a/core/modules/contextual/lib/Drupal/contextual/Plugin/views/field/ContextualLinks.php
+++ b/core/modules/contextual/lib/Drupal/contextual/Plugin/views/field/ContextualLinks.php
@@ -9,7 +9,7 @@
 
 use Drupal\views\Plugin\views\field\FieldPluginBase;
 use Drupal\views\ResultRow;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 
 /**
  * Provides a handler that adds contextual links.
diff --git a/core/modules/editor/lib/Drupal/editor/Tests/EditIntegrationTest.php b/core/modules/editor/lib/Drupal/editor/Tests/EditIntegrationTest.php
index b0075d2..dfff415 100644
--- a/core/modules/editor/lib/Drupal/editor/Tests/EditIntegrationTest.php
+++ b/core/modules/editor/lib/Drupal/editor/Tests/EditIntegrationTest.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\editor\Tests;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Core\Language\Language;
 use Drupal\edit\EditorSelector;
 use Drupal\edit\MetadataGenerator;
diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index 324be33..d163cd9 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -10,7 +10,7 @@
  * object files are supported.
  */
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Language\Language;
 use Drupal\Component\Utility\Crypt;
diff --git a/core/modules/node/lib/Drupal/node/Tests/Views/NodeContextualLinksTest.php b/core/modules/node/lib/Drupal/node/Tests/Views/NodeContextualLinksTest.php
index ff390e6..965d56f 100644
--- a/core/modules/node/lib/Drupal/node/Tests/Views/NodeContextualLinksTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/Views/NodeContextualLinksTest.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\node\Tests\Views;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Symfony\Component\HttpFoundation\Request;
 
 /**
diff --git a/core/modules/system/lib/Drupal/system/Controller/SystemController.php b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
index 361f716..30770df 100644
--- a/core/modules/system/lib/Drupal/system/Controller/SystemController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\system\Controller;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Core\Controller\ControllerBase;
 use Drupal\Core\Entity\Query\QueryFactory;
 use Drupal\Core\Extension\ThemeHandlerInterface;
diff --git a/core/modules/system/tests/modules/form_test/form_test.module b/core/modules/system/tests/modules/form_test/form_test.module
index de5c2f0..dc65d0d 100644
--- a/core/modules/system/tests/modules/form_test/form_test.module
+++ b/core/modules/system/tests/modules/form_test/form_test.module
@@ -5,7 +5,7 @@
  * Helper module for the form API tests.
  */
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Core\Database\Connection;
 use Drupal\Core\Database\Database;
 use Drupal\Core\Language\Language;
diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TermTest.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TermTest.php
index 5a53567..02a35a3 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TermTest.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TermTest.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\taxonomy\Tests;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Component\Utility\Tags;
 use Drupal\Core\Field\FieldDefinitionInterface;
 
diff --git a/core/modules/views/lib/Drupal/views/Tests/ViewAjaxTest.php b/core/modules/views/lib/Drupal/views/Tests/ViewAjaxTest.php
index d8728d1..af2307f 100644
--- a/core/modules/views/lib/Drupal/views/Tests/ViewAjaxTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/ViewAjaxTest.php
@@ -6,7 +6,7 @@
  */
 
 namespace Drupal\views\Tests;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 
 /**
  * Tests the ajax view functionality.
diff --git a/core/modules/views/tests/Drupal/views/Tests/Controller/SystemControllerTest.php b/core/modules/views/tests/Drupal/views/Tests/Controller/SystemControllerTest.php
index 82c694e..a5f9726 100644
--- a/core/modules/views/tests/Drupal/views/Tests/Controller/SystemControllerTest.php
+++ b/core/modules/views/tests/Drupal/views/Tests/Controller/SystemControllerTest.php
@@ -8,7 +8,7 @@
 namespace Drupal\edit\Tests\Access;
 
 use Symfony\Component\HttpFoundation\Request;
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Core\Template\Attribute;
 use Drupal\system\Controller\SystemController;
 use Drupal\Tests\UnitTestCase;
diff --git a/core/tests/Drupal/Tests/Component/Utility/JsonTest.php b/core/tests/Drupal/Tests/Core/Serialization/JsonTest.php
similarity index 95%
rename from core/tests/Drupal/Tests/Component/Utility/JsonTest.php
rename to core/tests/Drupal/Tests/Core/Serialization/JsonTest.php
index c1a8343..dcc8951 100644
--- a/core/tests/Drupal/Tests/Component/Utility/JsonTest.php
+++ b/core/tests/Drupal/Tests/Core/Serialization/JsonTest.php
@@ -2,18 +2,18 @@
 
 /**
  * @file
- * Contains \Drupal\Tests\Component\Utility\JsonTest.
+ * Contains \Drupal\Tests\Core\Serialization\JsonTest.
  */
 
-namespace Drupal\Tests\Component\Utility;
+namespace Drupal\Tests\Core\Serialization;
 
-use Drupal\Component\Utility\Json;
+use Drupal\Core\Serialization\Json;
 use Drupal\Tests\UnitTestCase;
 
 /**
  * Tests the Json::encode() and Json::decode() functions.
  *
- * @see \Drupal\Component\Utility\Json
+ * @see \Drupal\Core\Serialization\Json
  */
 class JsonTest extends UnitTestCase {