diff --git a/ChangeLog.md b/ChangeLog.md
index e09bf37..5c5f030 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,7 +1,7 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-## Unreleased
+## [0.9.0] -- 2021-08-17
 
 ### Added
 - A new simulation engine, using Web Workers, has been added. It is more responsible and can be much faster than the original one (25x measured improvement).
diff --git a/package-lock.json b/package-lock.json
index 6dc7724..9e7e0c5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "digitaljs",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 29bd00c..ecd2023 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "digitaljs",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "description": "Digital logic simulator",
   "main": "./lib/circuit.js",
   "files": [