diff --git a/Gemfile b/Gemfile
index 5714b981..3677d738 100644
--- a/Gemfile
+++ b/Gemfile
@@ -79,6 +79,7 @@ gem 'webpacker'
 gem 'yaml_db', git: 'https://0xacab.org/sutty/yaml_db.git'
 gem 'kaminari'
 gem 'device_detector'
+gem 'htmlbeautifier'
 gem 'dry-schema'
 gem 'rubanok'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 7f5284ef..2adf2f1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -269,6 +269,7 @@ GEM
     hiredis (0.6.3-x86_64-linux-musl)
     hiredis-client (0.14.1-x86_64-linux-musl)
       redis-client (= 0.14.1)
+    htmlbeautifier (1.4.2)
     http_parser.rb (0.8.0-x86_64-linux-musl)
     httparty (0.21.0)
       mini_mime (>= 1.0.0)
@@ -659,6 +660,7 @@ DEPENDENCIES
   hamlit-rails
   hiredis
   hiredis-client
+  htmlbeautifier
   httparty
   icalendar
   image_processing
diff --git a/app/models/metadata_content.rb b/app/models/metadata_content.rb
index 761518e8..444ee2fe 100644
--- a/app/models/metadata_content.rb
+++ b/app/models/metadata_content.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'htmlbeautifier'
+
 # Se encarga del contenido del artículo y quizás otros campos que
 # requieran texto largo.
 class MetadataContent < MetadataTemplate
@@ -86,7 +88,7 @@ class MetadataContent < MetadataTemplate
       end
     end
 
-    html.to_s.html_safe
+    HtmlBeautifier.beautify(html.to_s).html_safe
   end
 
   # Limpia estilos en base a una lista de permitidos
diff --git a/db/migrate/20240227134845_create_fediblocks.rb b/db/migrate/20240227134845_create_fediblocks.rb
index 03f65f7c..1a61ccba 100644
--- a/db/migrate/20240227134845_create_fediblocks.rb
+++ b/db/migrate/20240227134845_create_fediblocks.rb
@@ -12,7 +12,7 @@ class CreateFediblocks < ActiveRecord::Migration[6.1]
       t.string :url, null: false
       t.string :download_url, null: false
       t.string :format, null: false
-      t.jsonb  :instances, default: []
+      t.jsonb  :hostnames, default: []
     end
 
     YAML.safe_load(File.read('db/seeds/activity_pub/fediblocks.yml')).each do |fediblock|
diff --git a/db/migrate/20240228171335_rename_fediblock_instances_to_hostnames.rb b/db/migrate/20240228171335_rename_fediblock_instances_to_hostnames.rb
deleted file mode 100644
index bad343f2..00000000
--- a/db/migrate/20240228171335_rename_fediblock_instances_to_hostnames.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# frozen_string_literal: true
-
-# Cambia el nombre de la columna para que podamos obtener todas las
-# instancias de un fediblock
-class RenameFediblockInstancesToHostnames < ActiveRecord::Migration[6.1]
-  def change
-    rename_column :activity_pub_fediblocks, :instances, :hostnames
-  end
-end
diff --git a/db/seeds/activity_pub/fediblocks.yml b/db/seeds/activity_pub/fediblocks.yml
index c977f9bf..35fe38cd 100644
--- a/db/seeds/activity_pub/fediblocks.yml
+++ b/db/seeds/activity_pub/fediblocks.yml
@@ -6,7 +6,7 @@
   id: "9046789a-5de8-4b16-beed-796060f8f3cc"
 - title: "Oliphant Tier 0"
   url: "https://writer.oliphant.social/oliphant/the-oliphant-social-blocklist"
-  download_url: "https://codeberg.org/oliphant/blocklists/raw/branch/main/blocklists/mastodon/tier0.csv"
+  download_url: "https://codeberg.org/oliphant/blocklists/raw/branch/main/blocklists/mastodon/seirdy-tier0.csv"
   format: "mastodon"
   id: "fc1efcb8-7e68-4a76-ae9e-0c447752b12b"
 - title: "The Bad Space (90%)"