diff --git a/app/models/metadata_template.rb b/app/models/metadata_template.rb
index 97a631c1..6a86d45a 100644
--- a/app/models/metadata_template.rb
+++ b/app/models/metadata_template.rb
@@ -198,12 +198,12 @@ MetadataTemplate = Struct.new(:site, :document, :name, :label, :type,
 
   def allowed_attributes
     @allowed_attributes ||= %w[style href src alt controls data-align data-multimedia data-multimedia-inner id
-                               name rel target referrerpolicy class].freeze
+                               name rel target referrerpolicy class colspan rowspan].freeze
   end
 
   def allowed_tags
     @allowed_tags ||= %w[strong em del u mark p h1 h2 h3 h4 h5 h6 ul ol li img iframe audio video div figure blockquote
-                         figcaption a sub sup small].freeze
+                         figcaption a sub sup small table thead tbody tfoot tr th td].freeze
   end
 
   # Decifra el valor