diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6524b7b..ff27be2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## next
+## 6.0.0 (December 14, 2021)
 
 - Changed supported versions of Node.js to `^12.20.0`, `^14.13.0` and `>=15.0.0`
 - Converted to ES modules, CommonJS is supported as well (dual module)
diff --git a/package-lock.json b/package-lock.json
index e4e575a..6c4601e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "postcss-csso",
-  "version": "5.0.1",
+  "version": "6.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "postcss-csso",
-      "version": "5.0.1",
+      "version": "6.0.0",
       "license": "MIT",
       "dependencies": {
         "csso": "^5.0.1"
diff --git a/package.json b/package.json
index e24ee6f..f6a4e1f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "postcss-csso",
-  "version": "5.0.1",
+  "version": "6.0.0",
   "description": "PostCSS plugin to minify CSS using CSSO",
   "keywords": [
     "css",