diff --git a/lib/banzai/filter/external_link_filter.rb b/lib/banzai/filter/external_link_filter.rb
index d179bea181e..699de56fd4c 100644
--- a/lib/banzai/filter/external_link_filter.rb
+++ b/lib/banzai/filter/external_link_filter.rb
@@ -15,7 +15,7 @@ module Banzai
           # Skip internal links
           next if link.start_with?(internal_url)
 
-          node.set_attribute('rel', 'nofollow')
+          node.set_attribute('rel', 'nofollow noreferrer')
         end
 
         doc