diff --git a/docs/releases/v1.23.0.md b/docs/releases/v1.23.0.md
index e877533165..ef360a6b26 100644
--- a/docs/releases/v1.23.0.md
+++ b/docs/releases/v1.23.0.md
@@ -30,6 +30,18 @@ Thanks to [@pjungermann](https://github.com/pjungermann)’s work, we’ve now b
 
 This change also deprecates the original `@backstage/plugin-scaffolder-backend-module-bitbucket`, so if you’re using the new Backend System we encourage you to move towards using these new modules instead.
 
+### New lint rule to forbid top-level MUI imports
+
+The `@backstage/eslint-rules` package now provides the `@backstage/no-top-level-material-ui-4-imports` rule that forbids imports such as `import { Box } from '@material-ui/core'`. This rule is currently disabled by default and needs to be manually enabled in `.eslintrc.js`:
+
+```ts
+module.exports = require('@backstage/cli/config/eslint-factory')(__dirname, {
+  rules: {
+    '@backstage/no-top-level-material-ui-4-imports': 'error',
+  },
+});
+```
+
 ### Automatic package `repository` fields
 
 The `backstage-cli repo fix` command will now update the `repository` fields in all workspace packages, as long as the root `package.json` has the `repository` field set.