Core/Media/Imagick/Manager.php

@@ -42,7 +42,7 @@ class Manager
 
  $this->image->setImageBackgroundColor('white');
 
- $this->image = $this->image->flattenImages();
+ $this->image = $this->image->mergeImageLayers($this->image::LAYERMETHOD_FLATTEN);
 
  $this->image->setImageCompression($quality);
  $this->image->setImageFormat('jpg');

Core/Media/Imagick/Resize.php

@@ -154,7 +154,7 @@ class Resize
 
  $this->output->setImageBackgroundColor('white');
 
- $this->output = $this->output->flattenImages();
+ $this->output = $this->output->mergeImageLayers($this->image::LAYERMETHOD_FLATTEN);
 
  $this->output->setImageCompression($quality);
  $this->output->setImageFormat('jpg');