diff --git a/user_agent_class.info.yml b/user_agent_class.info.yml
index f65fd05..333c6bc 100644
--- a/user_agent_class.info.yml
+++ b/user_agent_class.info.yml
@@ -2,4 +2,5 @@ name: 'User Agent Class'
 type: module
 description: 'Device & Browser Detect Class'
 core: 8.x
+core_version_requirement: ^8 || ^9
 package: 'Custom'