diff --git a/config/environments/production.rb b/config/environments/production.rb
index 1df4048..311bb8b 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -95,4 +95,6 @@ Rails.application.configure do
 
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  config.relative_url_root = "/13"
 end