diff --git a/composer.json b/composer.json
index 578c047..e474908 100644
--- a/composer.json
+++ b/composer.json
@@ -27,11 +27,6 @@
         "phpunit/phpunit": "^8.5.21 || ^9.5.10",
         "spatie/laravel-ray": "^1.29.7"
     },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "6.0-dev"
-        }
-    },
     "scripts": {
         "post-autoload-dump": "@prepare",
         "prepare": "@php vendor/bin/testbench package:discover --ansi",