diff --git a/composer.json b/composer.json
index 76322e2..0bf5a82 100644
--- a/composer.json
+++ b/composer.json
@@ -17,8 +17,7 @@
     }
   ],
   "require": {
-    "php": ">=7.3",
-    "drupal/core": "^8.9"
+    "php": ">=7.3"
   },
   "require-dev": {
     "phpunit/phpunit": "^7.5",
diff --git a/idc_migration.info.yml b/idc_migration.info.yml
index e0be9b4..9dc7267 100644
--- a/idc_migration.info.yml
+++ b/idc_migration.info.yml
@@ -2,6 +2,7 @@ name: IDC Migration
 type: module
 description: 'Custom migration plugins supporting IDC ingest'
 core: 8.x
+core_version_requirement: ^8 || ^9
 dependencies:
   - drupal:migrate
   - migrate_source_csv:migrate_source_csv