diff --git a/CHANGES.md b/CHANGES.md
index c1d2d0c20..7c4cfe583 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,7 +2,20 @@
 
 ## Unreleased
 
-## Version 0.4.0
+## Version 0.5.0
+
+Released 2022-05-15
+
+- [(#30) Add support for deriveKeyPair.](https://github.com/dajiaji/hpke-js/pull/30)
+- [(#30) [Breaking Change] Remove deriveKey.](https://github.com/dajiaji/hpke-js/pull/30)
+- [(#29) Fix upper limit check for sequence number of encryption.](https://github.com/dajiaji/hpke-js/pull/29)
+- [(#28) Improve test coverage.](https://github.com/dajiaji/hpke-js/pull/28)
+- [(#25) Add SerializeError.](https://github.com/dajiaji/hpke-js/pull/25)
+- [(#25) Enable lint test on github action.](https://github.com/dajiaji/hpke-js/pull/25)
+- [(#25) Introduce KemPrimitives to make it easy to add KEM algorithms.](https://github.com/dajiaji/hpke-js/pull/25)
+- [(#24) Introduce AeadKey interface to make it easy to add new AEAD algorithms.](https://github.com/dajiaji/hpke-js/pull/24)
+
+## Version 0.4.1
 
 Released 2022-05-12
 
diff --git a/README.md b/README.md
index c75a258f2..8fc6d3ba8 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ Using unpkg CDN:
 <script src="https://unpkg.com/hpke-js/dist/hpke.min.js"></script>
 
 <!-- use a specific version -->
-<script src="https://unpkg.com/hpke-js@0.4.1/dist/hpke.min.js"></script>
+<script src="https://unpkg.com/hpke-js@0.5.0/dist/hpke.min.js"></script>
 ```
 
 Using jsDelivr CDN:
@@ -88,7 +88,7 @@ Using jsDelivr CDN:
 <script src="https://cdn.jsdelivr.net/npm/hpke-js/dist/hpke.min.js"></script>
 
 <!-- use a specific version -->
-<script src="https://cdn.jsdelivr.net/npm/hpke-js@0.4.1/dist/hpke.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/hpke-js@0.5.0/dist/hpke.min.js"></script>
 ```
 
 ## Usage
diff --git a/package-lock.json b/package-lock.json
index febe90c91..0480d67d5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,11 +1,12 @@
 {
   "name": "hpke-js",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "0.4.1",
+      "name": "hpke-js",
+      "version": "0.5.0",
       "license": "MIT",
       "devDependencies": {
         "@types/jest": "^27.4.1",
@@ -2196,28 +2197,6 @@
       "integrity": "sha512-HhFHPiRXGYOCRlrhpiVDYKcFJRdO0sBElZ668M4lh2ER0YgnkLxECuFe7uWCf23FrcLc59Pqr7dHkTqmRPDHmw==",
       "dev": true,
       "hasInstallScript": true,
-      "dependencies": {
-        "esbuild-android-64": "0.14.36",
-        "esbuild-android-arm64": "0.14.36",
-        "esbuild-darwin-64": "0.14.36",
-        "esbuild-darwin-arm64": "0.14.36",
-        "esbuild-freebsd-64": "0.14.36",
-        "esbuild-freebsd-arm64": "0.14.36",
-        "esbuild-linux-32": "0.14.36",
-        "esbuild-linux-64": "0.14.36",
-        "esbuild-linux-arm": "0.14.36",
-        "esbuild-linux-arm64": "0.14.36",
-        "esbuild-linux-mips64le": "0.14.36",
-        "esbuild-linux-ppc64le": "0.14.36",
-        "esbuild-linux-riscv64": "0.14.36",
-        "esbuild-linux-s390x": "0.14.36",
-        "esbuild-netbsd-64": "0.14.36",
-        "esbuild-openbsd-64": "0.14.36",
-        "esbuild-sunos-64": "0.14.36",
-        "esbuild-windows-32": "0.14.36",
-        "esbuild-windows-64": "0.14.36",
-        "esbuild-windows-arm64": "0.14.36"
-      },
       "bin": {
         "esbuild": "bin/esbuild"
       },
@@ -2594,8 +2573,7 @@
         "esprima": "^4.0.1",
         "estraverse": "^5.2.0",
         "esutils": "^2.0.2",
-        "optionator": "^0.8.1",
-        "source-map": "~0.6.1"
+        "optionator": "^0.8.1"
       },
       "bin": {
         "escodegen": "bin/escodegen.js",
@@ -3816,7 +3794,6 @@
         "@types/node": "*",
         "anymatch": "^3.0.3",
         "fb-watchman": "^2.0.0",
-        "fsevents": "^2.3.2",
         "graceful-fs": "^4.2.9",
         "jest-regex-util": "^27.5.1",
         "jest-serializer": "^27.5.1",
diff --git a/package.json b/package.json
index b6083f7bc..ad833aec3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hpke-js",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "description": "A Hybrid Public Key Encryption (HPKE) library",
   "repository": {
     "type": "git",