diff --git a/php/modules/Album.php b/php/modules/Album.php
index 1b8d1c5..f4ed7f7 100644
--- a/php/modules/Album.php
+++ b/php/modules/Album.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Album extends Module {
+final class Album extends Module {
 
 	private $database	= null;
 	private $settings	= null;
diff --git a/php/modules/Database.php b/php/modules/Database.php
index 9b25860..131e5e2 100755
--- a/php/modules/Database.php
+++ b/php/modules/Database.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Database extends Module {
+final class Database extends Module {
 
 	private static $versions = array(
 		'020100', #2.1
diff --git a/php/modules/Import.php b/php/modules/Import.php
index 621c562..5c42dd1 100644
--- a/php/modules/Import.php
+++ b/php/modules/Import.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Import extends Module {
+final class Import extends Module {
 
 	private $database	= null;
 	private $settings	= null;
diff --git a/php/modules/Log.php b/php/modules/Log.php
index 1725020..5befb0a 100644
--- a/php/modules/Log.php
+++ b/php/modules/Log.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Log extends Module {
+final class Log extends Module {
 
 	public static function notice($database, $function, $line, $text = '') {
 
diff --git a/php/modules/Module.php b/php/modules/Module.php
index 3e8b672..ab9fb0a 100644
--- a/php/modules/Module.php
+++ b/php/modules/Module.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Module {
+abstract class Module {
 
 	protected $plugins = null;
 
@@ -25,7 +25,7 @@ class Module {
 
 	}
 
-	public static function dependencies($available = false) {
+	final public static function dependencies($available = false) {
 
 		if ($available===false) exit('Error: Can not execute function. Missing parameters or variables.');
 
diff --git a/php/modules/Photo.php b/php/modules/Photo.php
index 5f34ccb..ce99dd7 100755
--- a/php/modules/Photo.php
+++ b/php/modules/Photo.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Photo extends Module {
+final class Photo extends Module {
 
 	private $database	= null;
 	private $settings	= null;
diff --git a/php/modules/Plugins.php b/php/modules/Plugins.php
index 9663814..d58cbaf 100644
--- a/php/modules/Plugins.php
+++ b/php/modules/Plugins.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Plugins implements \SplSubject {
+final class Plugins implements \SplSubject {
 
 	private $files		= array();
 	private $observers	= array();
diff --git a/php/modules/Session.php b/php/modules/Session.php
index 524877b..3e27d98 100755
--- a/php/modules/Session.php
+++ b/php/modules/Session.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Session extends Module {
+final class Session extends Module {
 
 	private $settings = null;
 
diff --git a/php/modules/Settings.php b/php/modules/Settings.php
index f0f57f4..689fd1c 100755
--- a/php/modules/Settings.php
+++ b/php/modules/Settings.php
@@ -7,7 +7,7 @@
 
 if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
 
-class Settings extends Module {
+final class Settings extends Module {
 
 	private $database = null;