diff --git a/README.md b/README.md
index 03112d0..d3caad3 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # ⬆ Migration v3 -> v4
 
+## Upgrade MUI
+
+If you are using MUI you must upgrade `@mui/material` to `v5.9.3` or newer. 
+
 ## Breaking changes
 
 ### SSR setup
diff --git a/publish-a-module-that-uses-tss.md b/publish-a-module-that-uses-tss.md
index 5499a0d..6efdf20 100644
--- a/publish-a-module-that-uses-tss.md
+++ b/publish-a-module-that-uses-tss.md
@@ -62,3 +62,7 @@ yarn add YOUR_MODULE @emotion/react
 Regarding SSR setup you can forward your user to [the dedicated documentation](ssr/).
 {% endtab %}
 {% endtabs %}
+
+{% hint style="warning" %}
+Wherever you make use of [nested selectors](nested-selectors.md) you must [provide a `uniqId`](nested-selectors.md#ssr) to make sure your components will works in every SSR setup.
+{% endhint %}