diff --git a/ruby/hyperstack-config/lib/hyperstack-config.rb b/ruby/hyperstack-config/lib/hyperstack-config.rb
index 9e8701416..bf5cf9aa3 100644
--- a/ruby/hyperstack-config/lib/hyperstack-config.rb
+++ b/ruby/hyperstack-config/lib/hyperstack-config.rb
@@ -15,9 +15,9 @@ def self.naming_convention
   require 'hyperstack/active_support_string_inquirer.rb'
   require 'hyperstack_env'
   require 'hyperstack/hotloader/stub'
-  # because promises and features in opal-browsers are used everywhere we load them here
-  require 'promise'  
-  require 'opal-browser'
+  # uncommenting these lines breaks prerendering
+  # require 'promise'  
+  # require 'opal-browser'
 else
   require 'opal'
   # because promises and features in opal-browsers are used everywhere we load them here