diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 067340826..ec10b71f8 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
 CHANGELOG
 =========
 
+6.4.3 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
 6.4.2 (2022-08-25)
 ------------------
 
diff --git a/VERSION b/VERSION
index a4c853ea2..b20a7c5c7 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.4.2
+6.4.3.dev0