diff --git a/flexi_cart.info.yml b/flexi_cart.info.yml
index a8bec89..f5c19af 100644
--- a/flexi_cart.info.yml
+++ b/flexi_cart.info.yml
@@ -1,6 +1,6 @@
 name: Flexi Cart
 type: theme
-core: 8.x
+core_version_requirement: ^8 || ^9
 base theme: classy
 description: 'Flexi Cart is a ecommerce domain theme.'