diff --git a/CHANGES.txt b/CHANGES.txt
index 406366996..a2671aa1d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,8 @@
+4.0.1.dev0 (Next Release)
+-------------------------
+
+
+
 4.0.0 (2019-04-05)
 ------------------
 
diff --git a/supervisor/version.txt b/supervisor/version.txt
index 0c89fc927..1454f6ed4 100644
--- a/supervisor/version.txt
+++ b/supervisor/version.txt
@@ -1 +1 @@
-4.0.0
\ No newline at end of file
+4.0.1