diff --git a/web/themes/custom/opdavies/opdavies.info.yml b/web/themes/custom/opdavies/opdavies.info.yml
index 83f81fdf1..d02bd4888 100644
--- a/web/themes/custom/opdavies/opdavies.info.yml
+++ b/web/themes/custom/opdavies/opdavies.info.yml
@@ -1,6 +1,6 @@
 name: opdavies
 description: A starter kit theme for Drupal 8 and Tailwind CSS.
-core: 8.x
+core_version_requirement: ^8 || ^9
 type: theme
 base theme: stable
 libraries: