diff --git a/tdd_blog.info.yml b/tdd_blog.info.yml
index f9453b1..1cdb6c0 100644
--- a/tdd_blog.info.yml
+++ b/tdd_blog.info.yml
@@ -1,6 +1,7 @@
 name: 'TDD Blog'
 description: 'A demo module for DrupalCamp Dublin to show test driven module development.'
 core: 8.x
+core_version_requirement: ^8 || ^9
 type: module
 
 dependencies: