diff --git a/Classes/Updates/GridelementsToContainerMigration.php b/Classes/Updates/GridelementsToContainerMigration.php
index fe6e1b0..9a205cb 100755
--- a/Classes/Updates/GridelementsToContainerMigration.php
+++ b/Classes/Updates/GridelementsToContainerMigration.php
@@ -34,11 +34,6 @@ class GridelementsToContainerMigration implements UpgradeWizardInterface
         $this->logger = $logManager->getLogger(self::class);
     }
 
-    public function getIdentifier(): string
-    {
-        return 'gridelementsToContainer';
-    }
-
     public function getTitle(): string
     {
         return 'Migrate gridelements to container';
diff --git a/Classes/Updates/ParentChildToContainerMigration.php b/Classes/Updates/ParentChildToContainerMigration.php
index 7fe8ea2..685daab 100755
--- a/Classes/Updates/ParentChildToContainerMigration.php
+++ b/Classes/Updates/ParentChildToContainerMigration.php
@@ -34,11 +34,6 @@ class ParentChildToContainerMigration implements UpgradeWizardInterface
         $this->logger = $logManager->getLogger(self::class);
     }
 
-    public function getIdentifier(): string
-    {
-        return 'parentChildToContainer';
-    }
-
     public function getTitle(): string
     {
         return 'Migrate parent/child to container';
diff --git a/composer.json b/composer.json
index 6116d9e..4aa554c 100755
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
 		}
 	},
 	"require": {
-		"typo3/cms-core": "^11.5 || ^12.4 || dev-main",
+		"typo3/cms-core": "^12.4 || 12.4.x-dev || dev-main",
 
 		"typo3/cms-backend": "*",
 		"typo3/cms-extbase": "*",