diff --git a/lib/tasks/uploads.rake b/lib/tasks/uploads.rake
index 027351fe3e3..a4b85c18dd9 100644
--- a/lib/tasks/uploads.rake
+++ b/lib/tasks/uploads.rake
@@ -425,7 +425,9 @@ def migrate_to_s3
 
       puts "Rebaking posts with lightboxes..."
 
-      Post.where("cooked LIKE '%class=\"lightbox\"%'").find_each(&:rebake!)
+      Post.where("cooked LIKE '%class=\"lightbox\"%'").find_each do |post|
+        post.rebake!(priority: :ultra_low)
+      end
     end
   end