diff --git a/Image.class.php b/Image.class.php
index fce7b72..96c4df1 100644
--- a/Image.class.php
+++ b/Image.class.php
@@ -20,6 +20,8 @@ abstract class Image extends File
 
     protected static $sizes = array();
 
+    protected static $watermarks = array();
+
     public static function getClassName()
     {
         return get_called_class();
@@ -50,6 +52,11 @@ abstract class Image extends File
         return static::$sizes;
     }
 
+    public static function getWatermark($size)
+    {
+        return (isset(static::$watermarks[$size])) ? static::$watermarks[$size] : false;
+    }
+
     public static function getMaxWidth()
     {
         return static::$max_width;
diff --git a/Upload.class.php b/Upload.class.php
index cff16b1..5354fae 100644
--- a/Upload.class.php
+++ b/Upload.class.php
@@ -79,6 +79,16 @@ abstract class Upload
                 . ' ' . self::getFilePath($image_variant));
             ob_clean();
         }
+        if ($image->getWatermark($size) && Config::get('PYTHON_PIL_PASTE')) {
+            $script_file_path = Config::get('PYTHON_PIL_PASTE')->script_file_path;
+            $pil_options = (isset(Config::get('PYTHON_PIL_PASTE')->pil_options) && Config::get('PYTHON_PIL_PASTE')->pil_options) ? ' ' . implode(' ', Config::get('PYTHON_PIL_PASTE')->pil_options) : '';
+            ob_start();
+            exec($script_file_path
+                . $pil_options
+                . ' ' . self::getFilePath($image_variant)
+                . ' ' . Config::get('PATH_WEB_ROOT') . '/' . $image->getWatermark($size));
+            ob_clean();
+        }
     }
 
     /**