diff --git a/Project.toml b/Project.toml
index 142ef38..df43fe6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "AbstractDifferentiation"
 uuid = "c29ec348-61ec-40c8-8164-b8c60e9d9f3d"
 authors = ["Mohamed Tarek <mohamed82008@gmail.com> and contributors"]
-version = "0.3.0"
+version = "0.4.0-DEV"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"