diff --git a/UPGRADE-5.7.md b/UPGRADE-5.7.md
index cdf53c3f0b..9dae54c28f 100644
--- a/UPGRADE-5.7.md
+++ b/UPGRADE-5.7.md
@@ -8,8 +8,14 @@ MediaBundle
 This call now also requires a mandatory header called "x-upload-token". The content of this header
 should be a csrf token generated by the Symfony csrf service using the name "bulk-upload-media".
 This header is an added security layer to avoid unintended and malicious uploads.
+* Validator\Constraints\Media and Validator\Constraints\HasGuessableExtension have had their error constant values changed from integer to string uuid's because integers have been deprecated by Symfony.
 
 UserManagementBundle
 ------------
 
 * Using the deleteAction method from the UsersController is deprecated since KunstmaanUserManagementBundle 5.6 and will be replaced by the method deleteFormAction in KunstmaanUserManagementBundle 6.0. Use the correct method instead. The new action is POST only and will have correct csrf protection.
+
+AdminBundle
+------------
+
+* Validator\Constraints\PasswordRestrictions have had their error constant values changed from integer to string uuid's because integers have been deprecated by Symfony.
diff --git a/src/Kunstmaan/AdminBundle/Validator/Constraints/PasswordRestrictions.php b/src/Kunstmaan/AdminBundle/Validator/Constraints/PasswordRestrictions.php
index 4879f50918..80fe84c60a 100644
--- a/src/Kunstmaan/AdminBundle/Validator/Constraints/PasswordRestrictions.php
+++ b/src/Kunstmaan/AdminBundle/Validator/Constraints/PasswordRestrictions.php
@@ -9,25 +9,15 @@
  */
 class PasswordRestrictions extends Constraint
 {
-    const INVALID_MIN_DIGITS_ERROR = 1;
-    const INVALID_MIN_UPPERCASE_ERROR = 2;
-    const INVALID_MIN_SPECIAL_CHARACTERS_ERROR = 3;
-    const INVALID_MIN_LENGTH_ERROR = 4;
-    const INVALID_MAX_LENGTH_ERROR = 5;
+    public const INVALID_MIN_DIGITS_ERROR = 'af8b48ce-be95-4149-8ab8-f0770536c414';
+    public const INVALID_MIN_UPPERCASE_ERROR = '00939a50-4d1c-4cdc-8361-8a5c28ad9c54';
+    public const INVALID_MIN_SPECIAL_CHARACTERS_ERROR = '9e905eb6-0ece-4238-8ce9-1eb937280737';
+    public const INVALID_MIN_LENGTH_ERROR = '61c8ff3a-027b-449f-ad2d-2c8a3590d778';
+    public const INVALID_MAX_LENGTH_ERROR = '4203e839-0e15-4d9a-be26-68adbdc75614';
 
-    const MESSAGE_MIN_DIGITS = 'errors.password.mindigits';
-    const MESSAGE_MIN_UPPERCASE = 'errors.password.minuppercase';
-    const MESSAGE_MIN_SPECIAL_CHARACTERS = 'errors.password.minspecialcharacters';
-    const MESSAGE_MIN_LENGTH = 'errors.password.minlength';
-    const MESSAGE_MAX_LENGTH = 'errors.password.maxlength';
-
-    /**
-     * PasswordRestrictions constructor.
-     *
-     * @param null $options
-     */
-    public function __construct($options = null)
-    {
-        parent::__construct($options);
-    }
+    public const MESSAGE_MIN_DIGITS = 'errors.password.mindigits';
+    public const MESSAGE_MIN_UPPERCASE = 'errors.password.minuppercase';
+    public const MESSAGE_MIN_SPECIAL_CHARACTERS = 'errors.password.minspecialcharacters';
+    public const MESSAGE_MIN_LENGTH = 'errors.password.minlength';
+    public const MESSAGE_MAX_LENGTH = 'errors.password.maxlength';
 }
diff --git a/src/Kunstmaan/MediaBundle/Validator/Constraints/HasGuessableExtension.php b/src/Kunstmaan/MediaBundle/Validator/Constraints/HasGuessableExtension.php
index 29d9bdd1b2..e5f921c59f 100644
--- a/src/Kunstmaan/MediaBundle/Validator/Constraints/HasGuessableExtension.php
+++ b/src/Kunstmaan/MediaBundle/Validator/Constraints/HasGuessableExtension.php
@@ -9,16 +9,11 @@
  */
 class HasGuessableExtension extends Constraint
 {
-    const NOT_GUESSABLE_ERROR = 1;
+    public const NOT_GUESSABLE_ERROR = '496c3e10-17a0-4bb0-b3ad-c2bf99731703';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_GUESSABLE_ERROR => 'NOT_GUESSABLE_ERROR',
-    );
+    ];
 
     public $notGuessableErrorMessage = 'The uploaded file has no extension and could not be automatically guessed by the system.';
-
-    public function __construct($options = null)
-    {
-        parent::__construct($options);
-    }
 }
diff --git a/src/Kunstmaan/MediaBundle/Validator/Constraints/Media.php b/src/Kunstmaan/MediaBundle/Validator/Constraints/Media.php
index 788bb41c07..e3800c6df9 100644
--- a/src/Kunstmaan/MediaBundle/Validator/Constraints/Media.php
+++ b/src/Kunstmaan/MediaBundle/Validator/Constraints/Media.php
@@ -9,16 +9,16 @@
  */
 class Media extends Constraint
 {
-    const NOT_FOUND_ERROR = 1;
-    const NOT_READABLE_ERROR = 2;
-    const EMPTY_ERROR = 3;
-    const INVALID_MIME_TYPE_ERROR = 5;
-    const TOO_WIDE_ERROR = 11;
-    const TOO_NARROW_ERROR = 12;
-    const TOO_HIGH_ERROR = 13;
-    const TOO_LOW_ERROR = 14;
-
-    protected static $errorNames = array(
+    public const NOT_FOUND_ERROR = 'b707694b-ff60-4f3f-a1bb-22ecae5b6e0d';
+    public const NOT_READABLE_ERROR = 'b4fca756-28db-4c71-adfc-ef2a0c3c3d7c';
+    public const EMPTY_ERROR = 'bb60ad41-e149-407f-b52c-35023d123016';
+    public const INVALID_MIME_TYPE_ERROR = 'a6afff66-fe95-4f97-8753-de0b0ec9cdf3';
+    public const TOO_WIDE_ERROR = '30d779e0-0bb2-48d8-8571-9ce592ff04d3';
+    public const TOO_NARROW_ERROR = '2420b5ba-fd3e-4bf4-9f81-a91132ec42a3';
+    public const TOO_HIGH_ERROR = '9de7ece8-7837-4a6a-9602-6d0f4d2bd5fb';
+    public const TOO_LOW_ERROR = '8833baac-1c7f-402c-96b5-1cf7ac2eb955';
+
+    protected static $errorNames = [
         self::NOT_FOUND_ERROR => 'NOT_FOUND_ERROR',
         self::NOT_READABLE_ERROR => 'NOT_READABLE_ERROR',
         self::EMPTY_ERROR => 'EMPTY_ERROR',
@@ -27,7 +27,7 @@ class Media extends Constraint
         self::TOO_LOW_ERROR => 'TOO_LOW_ERROR',
         self::TOO_WIDE_ERROR => 'TOO_WIDE_ERROR',
         self::TOO_NARROW_ERROR => 'TOO_NARROW_ERROR',
-    );
+    ];
 
     public $minHeight;
 
@@ -39,7 +39,7 @@ class Media extends Constraint
 
     public $binaryFormat;
 
-    public $mimeTypes = array();
+    public $mimeTypes = [];
 
     public $notFoundMessage = 'The file could not be found.';
 
@@ -68,9 +68,4 @@ class Media extends Constraint
     public $uploadExtensionErrorMessage = 'A PHP extension caused the upload to fail.';
 
     public $uploadErrorMessage = 'The file could not be uploaded.';
-
-    public function __construct($options = null)
-    {
-        parent::__construct($options);
-    }
 }