diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78b61ddb4ccf..d333ce698112 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## Changelog
 ##### Unreleased
+- Nothing
+
+##### 3.20.1 - 2021.12.23
 - Fixed the order of calling reactions of already fulfilled / rejected promises in `Promise.prototype.then`, [#1026](https://github.com/zloirock/core-js/issues/1026)
 - Fixed possible memory leaking in specific promise chains
 - Fixed some missed dependencies of entries
diff --git a/README.md b/README.md
index 2a32bd717d82..1bbcc86fa675 100644
--- a/README.md
+++ b/README.md
@@ -175,14 +175,14 @@ queueMicrotask(() => console.log('called as microtask'));
 ### Installation:[⬆](#index)
 ```
 // global version
-npm install --save core-js@3.20.0
+npm install --save core-js@3.20.1
 // version without global namespace pollution
-npm install --save core-js-pure@3.20.0
+npm install --save core-js-pure@3.20.1
 // bundled global version
-npm install --save core-js-bundle@3.20.0
+npm install --save core-js-bundle@3.20.1
 ```
 
-Already bundled version of `core-js` [on CDN](https://unpkg.com/core-js-bundle@3.20.0) ([minified version](https://unpkg.com/core-js-bundle@3.20.0/minified.js)).
+Already bundled version of `core-js` [on CDN](https://unpkg.com/core-js-bundle@3.20.1) ([minified version](https://unpkg.com/core-js-bundle@3.20.1/minified.js)).
 
 ### `postinstall` message[⬆](#index)
 The `core-js` project needs your help, so the package shows a message about it after installation. If it causes problems for you, you can disable it:
diff --git a/deno/corejs/README.md b/deno/corejs/README.md
index 1e2b5c8d7630..05850e387a31 100644
--- a/deno/corejs/README.md
+++ b/deno/corejs/README.md
@@ -24,7 +24,7 @@
 
 *Example*:
 ```js
-import 'https://deno.land/x/corejs@v3.20.0/index.js'; // <- at the top of your entry point
+import 'https://deno.land/x/corejs@v3.20.1/index.js'; // <- at the top of your entry point
 
 Object.hasOwn({ foo: 42 }, 'foo');     // => true
 
diff --git a/deno/corejs/index.js b/deno/corejs/index.js
index eb1f343b5113..bf94c8579d42 100644
--- a/deno/corejs/index.js
+++ b/deno/corejs/index.js
@@ -1,5 +1,5 @@
 /**
- * core-js 3.20.0
+ * core-js 3.20.1
  * https://github.com/zloirock/core-js
  * License: http://rock.mit-license.org
  * © 2021 Denis Pushkarev (zloirock.ru)
@@ -868,7 +868,7 @@ var store = __webpack_require__(33);
 (module.exports = function (key, value) {
   return store[key] || (store[key] = value !== undefined ? value : {});
 })('versions', []).push({
-  version: '3.20.0',
+  version: '3.20.1',
   mode: IS_PURE ? 'pure' : 'global',
   copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
 });
diff --git a/lerna.json b/lerna.json
index a5f9d094c4f1..c4924741d03e 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,5 +1,5 @@
 {
-  "version": "3.20.0",
+  "version": "3.20.1",
   "packages": [
     "packages/*"
   ]
diff --git a/package.json b/package.json
index 683b5daf9196..fd2c79248b7d 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "3.20.0",
+  "version": "3.20.1",
   "devDependencies": {
     "@babel/cli": "^7.16.0",
     "@babel/core": "^7.16.5",
diff --git a/packages/core-js-builder/package.json b/packages/core-js-builder/package.json
index 66dc3eb622f1..f9f3fb31ea72 100644
--- a/packages/core-js-builder/package.json
+++ b/packages/core-js-builder/package.json
@@ -1,7 +1,7 @@
 {
   "name": "core-js-builder",
   "description": "core-js builder",
-  "version": "3.20.0",
+  "version": "3.20.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/zloirock/core-js.git",
@@ -9,8 +9,8 @@
   },
   "main": "index.js",
   "dependencies": {
-    "core-js": "3.20.0",
-    "core-js-compat": "3.20.0",
+    "core-js": "3.20.1",
+    "core-js-compat": "3.20.1",
     "mkdirp": ">=0.5.5 <1",
     "webpack": ">=4.46.0 <5"
   },
diff --git a/packages/core-js-bundle/package.json b/packages/core-js-bundle/package.json
index 285460949078..114ff5372283 100644
--- a/packages/core-js-bundle/package.json
+++ b/packages/core-js-bundle/package.json
@@ -1,7 +1,7 @@
 {
   "name": "core-js-bundle",
   "description": "Standard library",
-  "version": "3.20.0",
+  "version": "3.20.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/zloirock/core-js.git"
diff --git a/packages/core-js-compat/package.json b/packages/core-js-compat/package.json
index 5e36477bfe69..bc0c8a6d2920 100644
--- a/packages/core-js-compat/package.json
+++ b/packages/core-js-compat/package.json
@@ -1,7 +1,7 @@
 {
   "name": "core-js-compat",
   "description": "core-js compat",
-  "version": "3.20.0",
+  "version": "3.20.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/zloirock/core-js.git",
diff --git a/packages/core-js-pure/package.json b/packages/core-js-pure/package.json
index e361b8c73e6c..024c0d306b03 100644
--- a/packages/core-js-pure/package.json
+++ b/packages/core-js-pure/package.json
@@ -1,7 +1,7 @@
 {
   "name": "core-js-pure",
   "description": "Standard library",
-  "version": "3.20.0",
+  "version": "3.20.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/zloirock/core-js.git"
diff --git a/packages/core-js/internals/shared.js b/packages/core-js/internals/shared.js
index 7d1140177471..8bfa6a399aae 100644
--- a/packages/core-js/internals/shared.js
+++ b/packages/core-js/internals/shared.js
@@ -4,7 +4,7 @@ var store = require('../internals/shared-store');
 (module.exports = function (key, value) {
   return store[key] || (store[key] = value !== undefined ? value : {});
 })('versions', []).push({
-  version: '3.20.0',
+  version: '3.20.1',
   mode: IS_PURE ? 'pure' : 'global',
   copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
 });
diff --git a/packages/core-js/package.json b/packages/core-js/package.json
index b8c5136726d7..b4658935916a 100644
--- a/packages/core-js/package.json
+++ b/packages/core-js/package.json
@@ -1,7 +1,7 @@
 {
   "name": "core-js",
   "description": "Standard library",
-  "version": "3.20.0",
+  "version": "3.20.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/zloirock/core-js.git"