diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69d3561..6e6edc7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 4.5.1 (unreleased)
+
+
+- Nothing changed yet.
+
+
 ## 4.5.0 (2025-01-30)
 
 
diff --git a/VERSION b/VERSION
index a84947d..ed70cbb 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.5.0
+4.5.1.dev0