diff --git a/src/MadeYourDay/Contao/Slider.php b/src/MadeYourDay/Contao/Slider.php
index f832103..7836070 100644
--- a/src/MadeYourDay/Contao/Slider.php
+++ b/src/MadeYourDay/Contao/Slider.php
@@ -329,8 +329,7 @@ public function moduleOnloadCallback($dc)
 
 		if ($module->type === 'rocksolid_slider') {
 			$GLOBALS['TL_DCA'][$dc->table]['fields']['multiSRC']['eval']['isGallery'] = true;
-			$GLOBALS['TL_DCA'][$dc->table]['fields']['multiSRC']['eval']['filesOnly'] = true;
-			$GLOBALS['TL_DCA'][$dc->table]['fields']['multiSRC']['eval']['extensions'] = $GLOBALS['TL_CONFIG']['validImageTypes'];
+			$GLOBALS['TL_DCA'][$dc->table]['fields']['multiSRC']['eval']['extensions'] = \Config::get('validImageTypes');
 		}
 	}