diff --git a/linktitle.info.yml b/linktitle.info.yml
index 12729c4..9e22d7b 100644
--- a/linktitle.info.yml
+++ b/linktitle.info.yml
@@ -3,5 +3,6 @@ description: 'Adds an automated title-attribute to links.'
 package: Input filters
 type: module
 core: 8.x
+core_version_requirement: ^8 || ^9
 dependencies:
   - drupal:filter