diff --git a/src/Facades/ResponsiveImageCraft.php b/src/Facades/ResponsiveImageCraft.php
index 5ef3895..51f1fa2 100644
--- a/src/Facades/ResponsiveImageCraft.php
+++ b/src/Facades/ResponsiveImageCraft.php
@@ -5,6 +5,8 @@
 use Illuminate\Support\Facades\Facade;
 
 /**
+ * @method static string getCssVariables(string $file, int $maxWidth, array $extensions)
+ *
  * @see \Infernalmedia\ResponsiveImageCraft\ResponsiveImageCraft
  */
 class ResponsiveImageCraft extends Facade