diff --git a/simplei.info.yml b/simplei.info.yml
index e24a9f7..f11db17 100755
--- a/simplei.info.yml
+++ b/simplei.info.yml
@@ -3,3 +3,4 @@ description: Environment Indicator, Super Light.
 package: Administration
 type: module
 core: 8.x
+core_version_requirement: ^8 || ^9