diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f444255..95d79153 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [4.21.0](https://github.com/diplodoc-platform/transform/compare/v4.20.0...v4.21.0) (2024-07-15)
+
+
+### Features
+
+* add custom attrs ([1c3bc13](https://github.com/diplodoc-platform/transform/commit/1c3bc13bb499ff4d79b961b0d08c927afda46c44))
+* escape question mark from anchor ([#460](https://github.com/diplodoc-platform/transform/issues/460)) ([5f35b15](https://github.com/diplodoc-platform/transform/commit/5f35b15bd572313c7bbec0aca15d5840fec9c97d))
+
+
+### Bug Fixes
+
+* pop-up definition overlaps header ([#457](https://github.com/diplodoc-platform/transform/issues/457)) ([d0a7c66](https://github.com/diplodoc-platform/transform/commit/d0a7c66e35050051ec444e8b3b1a39e74f2182fb))
+
 ## [4.20.0](https://github.com/diplodoc-platform/transform/compare/v4.19.1...v4.20.0) (2024-07-02)
 
 
diff --git a/package-lock.json b/package-lock.json
index 210109f0..e891cf9f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@diplodoc/transform",
-  "version": "4.20.0",
+  "version": "4.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@diplodoc/transform",
-      "version": "4.20.0",
+      "version": "4.21.0",
       "license": "MIT",
       "dependencies": {
         "@diplodoc/tabs-extension": "^3.0.0",
diff --git a/package.json b/package.json
index 7dce7cc0..bbf96e0a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@diplodoc/transform",
-  "version": "4.20.0",
+  "version": "4.21.0",
   "description": "A simple transformer of text in YFM (Yandex Flavored Markdown) to HTML",
   "keywords": [
     "markdown",