diff --git a/lib/language_pack/rack.rb b/lib/language_pack/rack.rb
index 408010b63..13b542bf5 100644
--- a/lib/language_pack/rack.rb
+++ b/lib/language_pack/rack.rb
@@ -21,6 +21,8 @@ def default_config_vars
   end
 
   def default_process_types
+    return super if env("HEROKU_SKIP_WEB_DYNO")
+
     # let's special case thin here if we detect it
     web_process = bundler.has_gem?("thin") ?
       "bundle exec thin start -R config.ru -e $RACK_ENV -p ${PORT:-5000}" :