diff --git a/HISTORY.md b/HISTORY.md
index 9fd5dce..dc339be 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,5 @@
-unreleased
-==========
+0.9.0 / 2023-12-28
+==================
 
   * Add `partitioned` option for CHIPS support
   * Add `priority` option for Priority cookie support
diff --git a/package.json b/package.json
index a49610d..aa2eb96 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "cookies",
   "description": "Cookies, optionally signed using Keygrip.",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "author": "Jed Schmidt <tr@nslator.jp> (http://jed.is)",
   "contributors": [
     "Douglas Christopher Wilson <doug@somethingdoug.com>"