diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..47c8ea4
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,16 @@
+## [Unreleased]
+
+## [0.4.0] - 2018-08-29
+
+### Added
+
+- New `int` decoder
+
+### Changed
+
+- `decodeString` and `decodeValue` both support partial application out of the box
+- Messages and types on errors improved
+
+### Fixed
+
+- Errors
diff --git a/package-lock.json b/package-lock.json
index 158ff35..63d2c8a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-json-decode",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index ae61567..349be11 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-json-decode",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "A library ensuring type safety when decoding JSON data inspired by Elm",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",