Update composer.json

composer.json

@@ -13,7 +13,7 @@
     "require": {
         "php": "^7.0",
         "doctrine/common": ">2.2, <3.2",
-        "sonata-project/admin-bundle": "4.0.0-alpha-2",
+        "sonata-project/admin-bundle": "^4@dev",
         "symfony/config": "^5.1",
         "symfony/dependency-injection": "^5.1",
         "symfony/doctrine-bridge": "^5.1",
@@ -33,7 +33,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.2.x-dev"
+            "dev-master": "5.x-dev"
         }
     },