diff --git a/upgrade/sql/9.1.0.sql b/upgrade/sql/9.1.0.sql
new file mode 100644
index 000000000..387762cae
--- /dev/null
+++ b/upgrade/sql/9.1.0.sql
@@ -0,0 +1,7 @@
+SET SESSION sql_mode='';
+SET NAMES 'utf8mb4';
+
+/* Add a new field to cart_rule */
+/* https://github.com/PrestaShop/PrestaShop/pull/37911/ */
+ALTER TABLE `PREFIX_cart_rule` ADD COLUMN `type` varchar(128) DEFAULT NULL;
+CREATE INDEX `type` ON `PREFIX_cart_rule` (`type`)