diff --git a/docs/v3.x/migration-guide/migration-guide-3.0.x-to-3.1.x.md b/docs/v3.x/migration-guide/migration-guide-3.0.x-to-3.1.x.md
index 36e5f1ade3..9b431e4193 100644
--- a/docs/v3.x/migration-guide/migration-guide-3.0.x-to-3.1.x.md
+++ b/docs/v3.x/migration-guide/migration-guide-3.0.x-to-3.1.x.md
@@ -2,6 +2,12 @@
 
 **Make sure your server is not running until the end of the migration**
 
+:::warning
+If you are using **extensions** to create custom code or modifying existing code, you will need to update your code and compare your version to the new changes on the repository.
+<br>
+Not updating your **extensions** can break your app in unexpected ways that we cannot predict.
+:::
+
 ## Summary
 
 [[toc]]