diff --git a/UPGRADING b/UPGRADING
index 2787ea52558..abfc787fbf8 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -91,6 +91,15 @@ PHP 7.4 UPGRADE NOTES
     $user->name can only be assigned strings. For more information see the
     RFC: https://wiki.php.net/rfc/typed_properties_v2
 
+- FFI:
+  . A new extension which provides a simple way to call native functions, access
+    native variables and create/access data structures defined in C libraries.
+    RFC: https://wiki.php.net/rfc/ffi
+
+- OPcache:
+  . Support for preloading code has been added.
+    RFC: https://wiki.php.net/rfc/preload
+
 - PDO_OCI:
   . PDOStatement::getColumnMeta() is now available