diff --git a/app/controllers/active_storage/direct_uploads_controller_decorator.rb b/app/controllers/active_storage/direct_uploads_controller_decorator.rb
index f27c4cfb..3052f974 100644
--- a/app/controllers/active_storage/direct_uploads_controller_decorator.rb
+++ b/app/controllers/active_storage/direct_uploads_controller_decorator.rb
@@ -11,6 +11,17 @@ module ActiveStorage
         blob = ActiveStorage::Blob.create_before_direct_upload!(service_name: session[:service_name], **blob_args)
         render json: direct_upload_json(blob)
       end
+
+      private
+
+      # Normalizar los caracteres unicode en los nombres de archivos
+      # para que puedan propagarse correctamente a través de todo el
+      # stack.
+      def blob_args
+        params.require(:blob).permit(:filename, :byte_size, :checksum, :content_type, metadata: {}).to_h.symbolize_keys.tap do |ba|
+          ba[:filename] = ba[:filename].unicode_normalize(:nfkc)
+        end
+      end
     end
   end
 end