diff --git a/electron/package.json b/electron/package.json
index b6bc508..1736f90 100644
--- a/electron/package.json
+++ b/electron/package.json
@@ -1,6 +1,6 @@
 {
   "name": "elara-electron",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Electron build for Elara: a free coding game",
   "main": "main.js",
   "build": {
diff --git a/package.json b/package.json
index 256379a..09fd0f7 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "author": "Alex Browne <stephenalexbrowne@gmail.com>",
   "name": "elara",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "license": "SEE LICENSE in LICENSE.txt",
   "home": "https://albrow.github.io/elara/",
   "scripts": {
diff --git a/web/components/changelog.mdx b/web/components/changelog.mdx
index 33aefab..67f489f 100644
--- a/web/components/changelog.mdx
+++ b/web/components/changelog.mdx
@@ -1,5 +1,13 @@
 <a href="https://github.com/albrow/elara/commits/main" target="_blank">More info on GitHub</a>
 
+##### December 30, 2023 (version 0.4.0)
+
+- Added two new levels: "Order of Operations" (now level 7) and "Hidden Passage" (now level 20). Some level numbers have been shifted around to make room for these new levels.
+- Updated and optimized all music. Changes are most notable in "Measuring the Challenge" and "Not the End".
+- Added new ambient background music to the Hub.
+- Added a "Scroll for More" indicator to the journal whenever there is more content below the fold.
+- Wires now have colors, which makes it easier to see which wires are connected to which gates.
+
 ##### December 13, 2023 (version 0.3.1)
 
 - Fixed a bug where the ringtone sound effect was not being played (<a href="https://github.com/albrow/elara/issues/83" target="_blank">issue #83</a>).