diff --git a/app/models/metadata_content.rb b/app/models/metadata_content.rb
index 7598dc31..233d7448 100644
--- a/app/models/metadata_content.rb
+++ b/app/models/metadata_content.rb
@@ -54,6 +54,10 @@ class MetadataContent < MetadataTemplate
 
         # No permitimos recursos externos
         raise URI::Error unless Rails.application.config.hosts.include?(uri.hostname)
+
+        element['src'] = convert_src_to_internal_path uri
+
+        raise URI::Error if element['src'].blank?
       rescue URI::Error
         element.remove
       end
@@ -71,4 +75,27 @@ class MetadataContent < MetadataTemplate
 
     html.to_s.html_safe
   end
+
+  # Convierte una URI en una ruta interna del sitio actual
+  #
+  # XXX: No verifica si el archivo existe o no.  Se supone que existe
+  # porque ya fue subido antes.
+  #
+  # @param uri [URI]
+  # @return [String,nil]
+  def convert_src_to_internal_path(uri)
+    signed_id = uri.path.split('/').fifth
+    blob = ActiveStorage::Blob.find_signed(signed_id)
+
+    return unless blob
+    return unless blob.service_name == site.name
+
+    blob_path = Pathname.new(blob.service.path_for(blob.key)).realpath
+    site_path = Pathname.new(site.path).realpath
+
+    blob_path.relative_path_from(site_path).to_s
+  rescue ActiveSupport::MessageVerifier::InvalidSignature => e
+    ExceptionNotifier.notify_exception(e, data: { site: site.name })
+    nil
+  end
 end