diff --git a/src/FS.php b/src/FS.php
index 8ebdc5c..710e1ef 100644
--- a/src/FS.php
+++ b/src/FS.php
@@ -56,10 +56,8 @@
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Bernhard Schussek <bschussek@gmail.com>
  * @author Thomas Schulz <mail@king2500.net>
- *
- * @private
  */
-final class FS
+class FS
 {
     private static FileSystem $filesystem;
 
diff --git a/src/FileSystem.php b/src/FileSystem.php
index 552ce96..58b058e 100644
--- a/src/FileSystem.php
+++ b/src/FileSystem.php
@@ -59,7 +59,7 @@
 use function sys_get_temp_dir;
 use const DIRECTORY_SEPARATOR;
 
-final class FileSystem extends SymfonyFilesystem
+class FileSystem extends SymfonyFilesystem
 {
     /**
      * Returns whether a path is relative.