diff --git a/CHANGES.md b/CHANGES.md
index 1589a73d7..6639229a8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,13 @@
 
 ## Unreleased
 
+## Version 0.9.0
+
+Released 2022-05-28
+
+- [(#50) Add support for DHKEM(X448, HKDF-SHA512).](https://github.com/dajiaji/hpke-js/pull/50)
+- [(#49) Optimize suite\_id generation.](https://github.com/dajiaji/hpke-js/pull/49)
+
 ## Version 0.8.0
 
 Released 2022-05-24
diff --git a/README.md b/README.md
index 0cc0386c5..6ac3852a9 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@ 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@0.8.0/dist/hpke.min.js"></script>
+<script src="https://unpkg.com/hpke-js@0.9.0/dist/hpke.min.js"></script>
 ```
 
 Using jsDelivr CDN:
@@ -105,7 +105,7 @@ 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@0.8.0/dist/hpke.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/hpke-js@0.9.0/dist/hpke.min.js"></script>
 ```
 
 ## Usage
diff --git a/package-lock.json b/package-lock.json
index a56d2008a..9642964cc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "hpke-js",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "hpke-js",
-      "version": "0.8.0",
+      "version": "0.9.0",
       "license": "MIT",
       "dependencies": {
         "@stablelib/chacha20poly1305": "^1.0.1",
diff --git a/package.json b/package.json
index 283228d6e..6a87df155 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hpke-js",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "description": "A Hybrid Public Key Encryption (HPKE) library",
   "repository": {
     "type": "git",