diff --git a/ubercart.info b/ubercart.info
index ff740baf..c9c3dfe4 100644
--- a/ubercart.info
+++ b/ubercart.info
@@ -4,7 +4,7 @@ package = Ubercart - core
 backdrop = 1.x
 type = module
 
-dependencies[] = system (>= 1.21.0)
+dependencies[] = system (>= 1.28.2)
 dependencies[] = rules (>= 2.2.0)
 dependencies[] = views
 dependencies[] = image
diff --git a/uc_order/uc_order.rules_defaults.inc b/uc_order/uc_order.rules_defaults.inc
index 4fa5c18b..125bc669 100644
--- a/uc_order/uc_order.rules_defaults.inc
+++ b/uc_order/uc_order.rules_defaults.inc
@@ -8,6 +8,12 @@
  * Implements hook_default_rules_configuration().
  */
 function uc_order_default_rules_configuration() {
+  // If we are in the middle of upgrading from D7, filter_default_format() is
+  // not yet set, so don't return any default rules. See
+  // https://github.com/backdrop-contrib/ubercart/issues/484.
+  if (state_get('update_d7_upgrade')) {
+    return array();
+  }
   $rule = rules_reaction_rule();
   $rule->label = t('E-mail an order update notification');
   $rule->active = TRUE;