diff --git a/composer.json b/composer.json
index 5bc6bda..2f0419b 100644
--- a/composer.json
+++ b/composer.json
@@ -32,11 +32,7 @@
     "suggest": {
         "ext-fileinfo": "Improved support for file mime detection"
     },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "3.x-dev"
-        }
-    },
+    "extra": [],
     "minimum-stability": "dev",
     "prefer-stable": true
 }