diff --git a/composer.json b/composer.json
index 48d1ef75ee1..f72148038ec 100755
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,6 @@
         "ext-zlib": "*",
         "angelfqc/vimeo-api": "2.0.6",
         "apereo/phpcas": "^1.6",
-        "brumann/polyfill-unserialize": "^1.0",
         "chamilo/pclzip": "~2.8",
         "clue/graph": "~0.9.0",
         "culqi/culqi-php": "1.3.4",
diff --git a/main/inc/lib/UnserializeApi.php b/main/inc/lib/UnserializeApi.php
index 14244c9aeef..6a87789b994 100644
--- a/main/inc/lib/UnserializeApi.php
+++ b/main/inc/lib/UnserializeApi.php
@@ -1,8 +1,6 @@
 <?php
 /* For licensing terms, see /license.txt */
 
-use Brumann\Polyfill\Unserialize;
-
 /**
  * Class UnserializeApi.
  */
@@ -109,13 +107,13 @@ public static function unserialize($type, $serialized, $ignoreErrors = false)
         }
 
         if ($ignoreErrors) {
-            return @Unserialize::unserialize(
+            return @unserialize(
                 $serialized,
                 ['allowed_classes' => $allowedClasses]
             );
         }
 
-        return Unserialize::unserialize(
+        return unserialize(
             $serialized,
             ['allowed_classes' => $allowedClasses]
         );