diff --git a/composer.json b/composer.json
index 336ab46..6051348 100644
--- a/composer.json
+++ b/composer.json
@@ -48,8 +48,5 @@
             "/Tests/"
         ]
     },
-    "minimum-stability": "dev",
-    "extra": {
-        "branch-version": "5.1"
-    }
+    "minimum-stability": "dev"
 }