diff --git a/app/views/courses/_course.html.haml b/app/views/courses/_course.html.haml
index 910934a..074cd6b 100644
--- a/app/views/courses/_course.html.haml
+++ b/app/views/courses/_course.html.haml
@@ -5,6 +5,7 @@
   -if course.avatar.attached?
     .card-img-top
       = image_tag course.avatar, height: "200px", width: "100%"
+      -# = image_tag course.avatar.variant(resize_to_limit: [100, 100])
   .card-body
     %small= simple_format(course.short_description)
   .card-footer
diff --git a/config/application.rb b/config/application.rb
index 38e8f16..e544f4f 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -15,6 +15,7 @@ class Application < Rails::Application
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
     # Common ones are `templates`, `generators`, or `middleware`, for example.
     config.autoload_lib(ignore: %w[assets tasks])
+    config.active_storage.variant_processor = :mini_magick
 
     # Configuration for the application, engines, and railties goes here.
     #