diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 824fecd7..411256bc 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.0.5"
+  ".": "4.1.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b898ba7..8e5261b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## [4.1.0](https://github.com/eslint/csstree/compare/css-tree-v4.0.5...css-tree-v4.1.0) (2026-08-23)
+
+
+### Features
+
+* add UnsupportedMatchingTree error for var()/env() matching ([#147](https://github.com/eslint/csstree/issues/147)) ([b4b13f5](https://github.com/eslint/csstree/commit/b4b13f5299c3a5a1cbea47d46e4cf5fc296f0014))
+
+
+### Bug Fixes
+
+* allow page margin properties in `[@page](https://github.com/page)` rules ([#143](https://github.com/eslint/csstree/issues/143)) ([9cb5ec4](https://github.com/eslint/csstree/commit/9cb5ec4f78d500ce67333dae555c7e260b894b94))
+* update mdn-data ([#146](https://github.com/eslint/csstree/issues/146)) ([4a6d09c](https://github.com/eslint/csstree/commit/4a6d09cee6baff6202ef782dd7c5152399a6c50e))
+* update mdn-data ([#149](https://github.com/eslint/csstree/issues/149)) ([6d26a9f](https://github.com/eslint/csstree/commit/6d26a9f467247363ea23ce04a545986ebd612ffc))
+* update mdn-data ([#150](https://github.com/eslint/csstree/issues/150)) ([471a9c7](https://github.com/eslint/csstree/commit/471a9c7519ef9b9fc0d35e0f807a28dffd401c6f))
+
 ## [4.0.5](https://github.com/eslint/csstree/compare/css-tree-v4.0.4...css-tree-v4.0.5) (2026-07-19)
 
 
diff --git a/package-lock.json b/package-lock.json
index 6cc889a1..7918ed28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@eslint/css-tree",
-  "version": "4.0.5",
+  "version": "4.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@eslint/css-tree",
-      "version": "4.0.5",
+      "version": "4.1.0",
       "license": "MIT",
       "dependencies": {
         "mdn-data": "2.33.0",
diff --git a/package.json b/package.json
index a457058f..7916e65c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@eslint/css-tree",
-  "version": "4.0.5",
+  "version": "4.1.0",
   "description": "A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations",
   "author": "Roman Dvornov <rdvornov@gmail.com> (https://github.com/lahmatiy)",
   "license": "MIT",