diff --git a/composer.lock b/composer.lock
index eb2296d..43b74b6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1019,7 +1019,7 @@
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/log/zipball/fe0936ee26643249e916849d48e3a51d5f5e278b",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/1.0.0",
                 "reference": "1.0.0",
                 "shasum": ""
             },
diff --git a/core/lib/Drupal/Component/Serialization/Yaml.php b/core/lib/Drupal/Component/Serialization/Yaml.php
index ca4909c..0eb54e8 100644
--- a/core/lib/Drupal/Component/Serialization/Yaml.php
+++ b/core/lib/Drupal/Component/Serialization/Yaml.php
@@ -5,6 +5,7 @@
 use Drupal\Component\Serialization\Exception\InvalidDataTypeException;
 use Symfony\Component\Yaml\Parser;
 use Symfony\Component\Yaml\Dumper;
+use Symfony\Component\Yaml\Yaml as YamlComponent;
 
 /**
  * Default serialization for YAML using the Symfony component.
@@ -33,7 +34,7 @@ public static function decode($raw) {
       $yaml = new Parser();
       // Make sure we have a single trailing newline. A very simple config like
       // 'foo: bar' with no newline will fail to parse otherwise.
-      return $yaml->parse($raw, TRUE, FALSE);
+      return $yaml->parse($raw, YamlComponent::PARSE_OBJECT);
     }
     catch (\Exception $e) {
       throw new InvalidDataTypeException($e->getMessage(), $e->getCode(), $e);