diff --git a/CHANGES.md b/CHANGES.md
index 38e4a93..bd280b8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 ## Changes
 
+## 4.0.2 (unreleased)
+
+
+- Nothing changed yet.
+
+
 ## 4.0.1 (2024-03-01)
 
 - Fix specifying out a revision (#40)
diff --git a/pyproject.toml b/pyproject.toml
index 2ed8005..6da73cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "mxdev"
 description = "Enable to work with Python projects containing lots of packages, of which you only want to develop some."
-version = "4.0.1"
+version = "4.0.2.dev0"
 keywords = ["pip", "vcs", "git", "development"]
 authors = [
   {name = "MX Stack Developers", email = "dev@bluedynamics.com" }