diff --git a/CHANGELOG.md b/CHANGELOG.md
index faeccc2..496fdd4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [unreleased]
-- Change contract name `ChainlinkPriceFeed` to `ChainlinkPriceFeedV2`.
+## [0.4.0] - 2022-05-24
+- Add `ChainlinkPriceFeedV2`, which calculates the twap by cached twap.
 - Add origin `ChainlinkPriceFeed`, which calculates the twap by round data instead of cached twap.
 
 ## [0.3.4] - 2022-04-01
diff --git a/package-lock.json b/package-lock.json
index f9b13aa..f681326 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@perp/perp-oracle-contract",
-  "version": "0.3.4",
+  "version": "0.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@perp/perp-oracle-contract",
-      "version": "0.3.4",
+      "version": "0.4.0",
       "license": "GPL-3.0-or-later",
       "devDependencies": {
         "@chainlink/contracts": "0.1.7",
diff --git a/package.json b/package.json
index 0ac6cb5..e9abe82 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@perp/perp-oracle-contract",
-  "version": "0.3.4",
+  "version": "0.4.0",
   "description": "Perpetual Protocol Curie (v2) oracle contracts - v0.3.4 is not an audited version",
   "license": "GPL-3.0-or-later",
   "author": {