diff --git a/VERSION b/VERSION
index d64a6443..a724a9cd 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.0-dev
+2.4.0-dev
diff --git a/composer.json b/composer.json
index bad53ac1..41856656 100644
--- a/composer.json
+++ b/composer.json
@@ -97,7 +97,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.3-dev"
+            "dev-master": "2.4-dev"
         }
     },
     "minimum-stability": "dev",