diff --git a/src/Driver.php b/src/Driver.php
index eacb2b5..33c9632 100644
--- a/src/Driver.php
+++ b/src/Driver.php
@@ -124,7 +124,7 @@ protected function init()
         if ($this->options['imageManager']) {
             $this->imageManager = $this->options['imageManager'];
         } else {
-            $this->imageManager = new ImageManager();
+            $this->imageManager = ImageManager::gd();
         }
 
         // enable command archive