diff --git a/composer.json b/composer.json
index 2969681..36f6b6d 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.8.x-dev"
+            "dev-master": "4.0.x-dev"
         }
     }
 }