diff --git a/changelog.md b/changelog.md
index 16d90c3..b6c3351 100644
--- a/changelog.md
+++ b/changelog.md
@@ -8,6 +8,7 @@ These are the optimizations:
 
 - In `audio`, `Synthesizer` (which no longer exists) ran a very fast infinite loop to send samples to `Player`, and the loop needlessly consumed CPU resources. I replaced this loop with a bunch of `Arc<Mutex<T>>` values that are shared between `Conn` and `Player`. As a result of removing `Synthesizer` I had to reorganize all of the exporter code. There are a lot of small changes that I'm not going to list here because let's be real, no one reads verbose changelogs, but the most noticeable change is that `Exporter` is a field in `Conn` and is no longer shared (there is no `Arc<Mutex<Exporter>>` anywhere in the code). This change affects a *lot* of the codebase, but it's mostly just refactoring with zero functional differences.
 - In `input`, `Input` checked for key downs and presses very inefficently. I only had to change two lines of code to make it much faster. This optimizes CPU usage by roughly 10%.
+- A tiny optimization to drawing panel backgrounds. This required refactoring throughout `render`.
 
 This update doesn't have any new features or bug fixes. In the future, I'm going to reserve major releases (0.x.0) for big new features, but I had to rewrite so much of Cacophony's code, and the results are such a big improvement, that I'm making this a major release anyway.