diff --git a/migration-2.0.md b/migration-2.0.md
index 2b14f0d..282540f 100644
--- a/migration-2.0.md
+++ b/migration-2.0.md
@@ -158,6 +158,19 @@ $func = fn(
 $result = $collection->reduce(fn(int $x, int $y): int => $x + $y, 0);
 ```
 
+## [Section 8 - Anonymous Classes](https://www.php-fig.org/per/coding-style/#8-anonymous-classes)
+
+A new rule was added stating that if an anonymous class has no arguments, the `()` after `class` MUST be omitted.
+
+```php
+<?php
+
+// No arguments: `()` must be omitted.
+$instance = new class extends \Foo {
+    // Class content
+};
+```
+
 ## [Section 9 - Enumerations](https://www.php-fig.org/per/coding-style/#9-enumerations)
 
 Enums are now covered, as per the link above. Please see below for examples.