diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fc6b073..1d13ab06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,38 @@
 # Peaks.js
 
+## 4.0.0-beta.0
+
+* (#548) Added `zoomview.update` event, which is emitted when the time
+  range visible in the zoomable waveform view changes (@chrisn)
+
+* (#545) Fixed error on clicking to insert a segment at the edge of the
+  waveform view (@chrisn)
+
+* (#544) Added segment `markers` and `overlay` options, to individual
+  segments to be created as marker-style or overlay-style (@chrisn)
+
+* (#533) Clicking on a segment marker now brings that marker to the top
+  of the z-order, to allow it to be dragged (@chrisn)
+
+* (#546) The deprecated `peaks.ready` event has now been removed. You must
+  now provide a callback function to `Peaks.init()` (@chrisn)
+
+* (#550) Fixed `touchend` event handling, by registering it as non-passive
+  (@chrisn)
+
+* (#551) Fixed point and segment marker font defaults. These now use the
+  `fontFamily`, `fontSize`, and `fontStyle` options (@chrisn)
+
+* (#553) Fixed `segments.dblclick` events (@chrisn)
+
+* The waveform cache is now cleared on calling `peaks.destroy()` (@chrisn)
+
+* Fixed a bug where points and segments would not be displayed in the
+  zoomable waveform view after the view's width is changed (@chrisn)
+
+* The waveform views now initialise themselves to the correct position if the
+  playhead time is not zero when `Peaks.init()` is called (@chrisn)
+
 ## 3.4.2 (2024/08/15)
 
 * (#536) Prevent the zoomview from scrolling when set to `auto` zoom level
diff --git a/package-lock.json b/package-lock.json
index db9b1906..0325ee58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "peaks.js",
-  "version": "3.4.2",
+  "version": "4.0.0-beta.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "peaks.js",
-      "version": "3.4.2",
+      "version": "4.0.0-beta.0",
       "license": "LGPL-3.0",
       "dependencies": {
         "eventemitter3": "~5.0.1"
diff --git a/package.json b/package.json
index 8f21e850..f4e37fcf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "peaks.js",
-  "version": "3.4.2",
+  "version": "4.0.0-beta.0",
   "description": "JavaScript UI component for displaying audio waveforms",
   "main": "./dist/peaks.min.js",
   "module": "./dist/peaks.esm.js",