diff --git a/composer.json b/composer.json
index 3f7e36aae..53db10671 100644
--- a/composer.json
+++ b/composer.json
@@ -54,10 +54,5 @@
             "/Tests/"
         ]
     },
-    "minimum-stability": "dev",
-    "extra": {
-        "branch-alias": {
-            "dev-master": "5.1-dev"
-        }
-    }
+    "minimum-stability": "dev"
 }