diff --git a/app/controllers/active_storage/disk_controller_decorator.rb b/app/controllers/active_storage/disk_controller_decorator.rb
index 07a166c3..0364efa9 100644
--- a/app/controllers/active_storage/disk_controller_decorator.rb
+++ b/app/controllers/active_storage/disk_controller_decorator.rb
@@ -11,7 +11,7 @@ module ActiveStorage
       # Permitir incrustar archivos subidos (especialmente PDFs) desde
       # otros sitios.
       def show
-        original_show.tap do |s|
+        original_show.tap do |_s|
           response.headers.delete 'X-Frame-Options'
         end
       end
@@ -57,7 +57,7 @@ module ActiveStorage
       end
 
       def limits(max_upload_size, max_download_size)
-        ruby_hash = { "max_upload_size": max_upload_size, "max_download_size": max_download_size }
+        ruby_hash = { max_upload_size: max_upload_size, max_download_size: max_download_size }
         json_string = JSON.generate(ruby_hash)
       end
 
@@ -69,15 +69,15 @@ module ActiveStorage
 
       def page_not_found(exception)
         head :not_found
-        ExceptionNotifier.notify_exception(exception, data: {params: params.to_hash})
+        ExceptionNotifier.notify_exception(exception, data: { params: params.to_hash })
       end
 
       def max_upload_size
-        max_upload_size_mbs = ENV['MAX_UPLOAD_SIZE'].to_i.megabytes
+        ENV['MAX_UPLOAD_SIZE'].to_i.megabytes
       end
 
       def max_download_size
-        max_download_size_mbs = ENV['MAX_DOWNLOAD_SIZE'].to_i.megabytes
+        ENV['MAX_DOWNLOAD_SIZE'].to_i.megabytes
       end
     end
   end