diff --git a/composer.json b/composer.json
index dd89b2f..af6832d 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
     "php": "~8.3.0 || ~8.4.0"
   },
   "conflict": {
-    "pimcore/admin-ui-classic-bundle": "<1.7 || > 1.7.99",
+    "pimcore/admin-ui-classic-bundle": "<2.x-dev",
     "pimcore/admin-ui-classic-light-theme-bundle": "<1.0 || > 1.0.99",
     "pimcore/asset-metadata-class-definitions": "<2.2 || > 2.2.99",
     "pimcore/backend-power-tools-bundle": "<1.2 || > 1.2.99",
@@ -33,7 +33,7 @@
     "pimcore/output-data-config-toolkit-bundle": "<5.2 || > 5.2.99",
     "pimcore/personalization-bundle": "<1.1 || > 1.1.99",
     "pimcore/perspective-editor": "<1.8 || > 1.8.99",
-    "pimcore/pimcore": "<12.0 || > 12.0.99",
+    "pimcore/pimcore": "<12.x-dev",
     "pimcore/portal-engine": "<4.2 || > 4.2.99",
     "pimcore/quill-bundle": "<1.0 || > 1.0.99",
     "pimcore/static-resolver-bundle": "<1.4 || > 1.4.99",