diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f0cd9c..9321451 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 4.0.0-dev
+## 4.0.0 (December 9, 2022)
 * Updated `sharp` dependency.
 * Updated `yargs` dependency.
 * Added [`affine`](https://sharp.pixelplumbing.com/api-operation#affine) command.