diff --git a/CHANGELOG.md b/CHANGELOG.md
index b522c4a..c3d07e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # natural-orderby
 
+## 4.0.0
+
+### Major Changes
+
+- fix: update `Identifier<T>` to be `keyof T` instead of any `string`
+
 ## 3.0.2
 
 ### Patch Changes
diff --git a/package.json b/package.json
index 3cddc18..2c918b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "natural-orderby",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "description": "Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.",
   "sideEffects": false,
   "main": "./dist/main.js",