diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 5fe20baa..60ac1989 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "2.28.0"
+    ".": "2.28.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4320c684..272615e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.28.1](https://github.com/mdn/data/compare/v2.28.0...v2.28.1) (2026-04-28)
+
+
+### Bug Fixes
+
+* **css:** correct the malformed reference in patternProperties for custom properties schema. ([#1065](https://github.com/mdn/data/issues/1065)) ([4c1ab15](https://github.com/mdn/data/commit/4c1ab15184c128412f9ba84796e12325ffeed91b))
+
 ## [2.28.0](https://github.com/mdn/data/compare/v2.27.1...v2.28.0) (2026-04-13)
 
 
diff --git a/package-lock.json b/package-lock.json
index 35e6d998..abe83b00 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mdn-data",
-  "version": "2.28.0",
+  "version": "2.28.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mdn-data",
-      "version": "2.28.0",
+      "version": "2.28.1",
       "license": "CC0-1.0",
       "devDependencies": {
         "ajv": "^7.2.4",
diff --git a/package.json b/package.json
index 5acfd38e..3168a54a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mdn-data",
-  "version": "2.28.0",
+  "version": "2.28.1",
   "description": "Open Web data by the Mozilla Developer Network",
   "main": "index.js",
   "files": [