diff --git a/blueprints.yaml b/blueprints.yaml
index 8691218f..75bb57b7 100644
--- a/blueprints.yaml
+++ b/blueprints.yaml
@@ -13,7 +13,7 @@ docs: https://github.com/getgrav/grav-plugin-admin/blob/develop/README.md
 license: MIT
 
 dependencies:
-    - { name: grav, version: '>=1.4.5' }
+    - { name: grav, version: '>=1.5.1' }
     - { name: form, version: '>=2.14.0' }
     - { name: login, version: '>=2.7.0' }
     - { name: email, version: '>=2.7.0' }
diff --git a/classes/Twig/AdminTwigExtension.php b/classes/Twig/AdminTwigExtension.php
index 516ff2ba..15d1eeab 100644
--- a/classes/Twig/AdminTwigExtension.php
+++ b/classes/Twig/AdminTwigExtension.php
@@ -2,10 +2,9 @@
 namespace Grav\Plugin\Admin\Twig;
 
 use Grav\Common\Grav;
+use Grav\Common\Yaml;
 use Grav\Common\Language\Language;
 use Grav\Common\Page\Page;
-use Symfony\Component\Yaml\Yaml;
-use Symfony\Component\Yaml\Parser;
 
 class AdminTwigExtension extends \Twig_Extension
 {
@@ -81,7 +80,7 @@ class AdminTwigExtension extends \Twig_Extension
         return $this->grav['admin']->translate($args, $lang);
     }
 
-    public function toYamlFilter($value, $inline = true)
+    public function toYamlFilter($value, $inline = null)
     {
         return Yaml::dump($value, $inline);
 
@@ -89,8 +88,7 @@ class AdminTwigExtension extends \Twig_Extension
 
     public function fromYamlFilter($value)
     {
-        $yaml = new Parser();
-        return $yaml->parse($value);
+        return Yaml::parse($value);
     }
 
     public function adminNicetimeFilter($date, $long_strings = true)
diff --git a/classes/admin.php b/classes/admin.php
index ea6d101a..b82bb657 100644
--- a/classes/admin.php
+++ b/classes/admin.php
@@ -27,7 +27,7 @@ use RocketTheme\Toolbox\ResourceLocator\UniformResourceIterator;
 use RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator;
 use RocketTheme\Toolbox\Session\Message;
 use RocketTheme\Toolbox\Session\Session;
-use Symfony\Component\Yaml\Yaml;
+use Grav\Common\Yaml;
 use Composer\Semver\Semver;
 use PicoFeed\Reader\Reader;
 
diff --git a/classes/admincontroller.php b/classes/admincontroller.php
index 0b3943e2..5f2c6855 100644
--- a/classes/admincontroller.php
+++ b/classes/admincontroller.php
@@ -19,12 +19,12 @@ use Grav\Common\Utils;
 use Grav\Common\Backup\ZipBackup;
 use Grav\Plugin\Admin\Twig\AdminTwigExtension;
 use Grav\Plugin\Login\TwoFactorAuth\TwoFactorAuth;
+use Grav\Common\Yaml;
 use RocketTheme\Toolbox\Event\Event;
 use RocketTheme\Toolbox\File\File;
 use RocketTheme\Toolbox\File\JsonFile;
 use RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator;
-use Symfony\Component\Yaml\Exception\ParseException;
-use Symfony\Component\Yaml\Yaml;
+
 
 /**
  * Class AdminController
@@ -760,16 +760,8 @@ class AdminController extends AdminBaseController
     public function checkValidFrontmatter($frontmatter)
     {
         try {
-            // Try native PECL YAML PHP extension first if available.
-            if (function_exists('yaml_parse')) {
-                $saved = @ini_get('yaml.decode_php');
-                @ini_set('yaml.decode_php', 0);
-                @yaml_parse("---\n" . $frontmatter . "\n...");
-                @ini_set('yaml.decode_php', $saved);
-            } else {
-                Yaml::parse($frontmatter);
-            }
-        } catch (ParseException $e) {
+            Yaml::parse($frontmatter);
+        } catch (\RuntimeException $e) {
             return false;
         }