diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..b95130a5
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,20 @@
+# Changelog
+
+## [0.4.0](https://github.com/web3-storage/pail/compare/v0.3.4...v0.4.0) (2024-01-10)
+
+
+### Features
+
+* batch put ([#27](https://github.com/web3-storage/pail/issues/27)) ([e1e1db6](https://github.com/web3-storage/pail/commit/e1e1db66ba26ff884b0f7614bb06fee2b3b54bec))
+
+
+### Bug Fixes
+
+* add missing dependency ([030ffb6](https://github.com/web3-storage/pail/commit/030ffb6fdf7293566497be46548c68021941fd31))
+* build before publish ([9be719c](https://github.com/web3-storage/pail/commit/9be719c7f5779a6b79276389f33a075e3fa046bb))
+* import ([13c8c59](https://github.com/web3-storage/pail/commit/13c8c59ca915b268124916b7d1411a963c009df9))
+
+
+### Performance Improvements
+
+* optimised sorted events find when head is tail ([7b9975b](https://github.com/web3-storage/pail/commit/7b9975bfe7b02ee582a41f3d7c3080201928f095))
diff --git a/package.json b/package.json
index 71e9903c..c70687cc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@web3-storage/pail",
-  "version": "1.0.0",
+  "version": "0.4.0",
   "description": "DAG based key value store.",
   "main": "src/index.js",
   "type": "module",