diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..900f3bc
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+## [4.0.0](https://github.com/alanshaw/abortable-iterator/compare/v3.0.1...v4.0.0) (2022-01-12)
+
+
+### ⚠ BREAKING CHANGES
+
+* switch to named exports, ESM only
+
+### Features
+
+* convert to typescript ([#16](https://github.com/alanshaw/abortable-iterator/issues/16)) ([7a36b81](https://github.com/alanshaw/abortable-iterator/commit/7a36b810e3956bdd3f27f40dc4c468dd74632c3f))
diff --git a/package.json b/package.json
index d18fe0c..54eb941 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "abortable-iterator",
-  "version": "3.0.1",
+  "version": "4.0.0",
   "description": "Make any iterator or iterable abortable via an AbortSignal",
   "type": "module",
   "types": "./dist/src/index.d.ts",