diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30fbbcc4..02d0e2eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Change Log
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## 4.21.2
+* Updated Firefox ESR.
+
 ## 4.21.1
 * Fixed parsing days in `since` query.
 
diff --git a/package.json b/package.json
index e28f66b9..5caf7834 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "browserslist",
-  "version": "4.21.1",
+  "version": "4.21.2",
   "description": "Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset",
   "keywords": [
     "caniuse",