diff --git a/CHANGELOG-2.x.md b/CHANGELOG-2.x.md
index ddd712b04842..eecc0f5165ff 100644
--- a/CHANGELOG-2.x.md
+++ b/CHANGELOG-2.x.md
@@ -3,6 +3,11 @@
 ## Unreleased
 
 - Fixed a bug in which if `themeConfig.algolia` is not defined, the custom searchbar won't appear.
+If you've swizzled Algolia `SearchBar` component before, please update your source code otherwise CSS might break
+```js
+- <Fragment>
++ <div className="navbar__search" key="search-box">
+```
 - Reduce memory usage consumption.
 - Slightly adjust search icon position to be more aligned on small width device.
 - Convert sitemap plugin to TypeScript.