diff --git a/src/Driver/DriverInterface.php b/src/Driver/DriverInterface.php
index 75c4fc5..cc000c0 100644
--- a/src/Driver/DriverInterface.php
+++ b/src/Driver/DriverInterface.php
@@ -15,6 +15,9 @@
 use Joli\JoliNotif\Exception\InvalidNotificationException;
 use Joli\JoliNotif\Notification;
 
+/**
+ * @internal
+ */
 interface DriverInterface
 {
     public const PRIORITY_LOW = 0;
diff --git a/src/Driver/LibNotifyDriver.php b/src/Driver/LibNotifyDriver.php
index e81b05e..ae5bc5d 100644
--- a/src/Driver/LibNotifyDriver.php
+++ b/src/Driver/LibNotifyDriver.php
@@ -17,6 +17,11 @@
 use Joli\JoliNotif\Util\PharExtractor;
 use JoliCode\PhpOsHelper\OsHelper;
 
+/**
+ * This driver can be used on Linux systems when libnotify and FFI are available.
+ *
+ * @internal
+ */
 class LibNotifyDriver implements DriverInterface
 {
     private const APP_NAME = 'JoliNotif';
diff --git a/src/Driver/SnoreToastDriver.php b/src/Driver/SnoreToastDriver.php
index f106d84..2784e21 100644
--- a/src/Driver/SnoreToastDriver.php
+++ b/src/Driver/SnoreToastDriver.php
@@ -18,6 +18,8 @@
 /**
  * This driver can be used on Windows Eight and higher and provides its own
  * binaries if not natively available.
+ *
+ * @internal
  */
 class SnoreToastDriver extends AbstractCliBasedDriver implements BinaryProviderInterface
 {