diff --git a/CHANGELOG.md b/CHANGELOG.md
index f547d48..dfb5355 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,13 @@ together from PyDevices/audiocomponents, and the history from v0.4.2rc1 back
 covers both packages. Releases up to and including audiodsp's v0.1.1 shipped
 both packages from audiodsp, and are recorded in its changelog.
 
+## v0.5.2.dev0 (2026-11-09)
+
+- audioeffects: each effect loads the first time it's used (#10)
+- Style check: fail a pull request on the mechanical style rules (#9)
+- LICENSE: copyright Brad Barnett, as the file headers say (#8)
+- Licence headers on every Python file (#7)
+
 ## v0.5.1 (2026-11-03)
 
 ### Removed
diff --git a/VERSION b/VERSION
index 4b9fcbe..9e18689 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.1
+0.5.2.dev0