diff --git a/upgrade.md b/upgrade.md
index 8f549d0e..5c8354fa 100644
--- a/upgrade.md
+++ b/upgrade.md
@@ -4,4 +4,5 @@ ## Upgrading From 4.0 to 4.1
 
 - `composer update`.
 - Replace `public/index.php`, `artisan.php`.
-- Add new `expire_on_close` option to `session` configuration file.
\ No newline at end of file
+- Add new `expire_on_close` option to `session` configuration file.
+- Remove call to `redirectIfTrailingSlash` in `bootstrap/start.php` file.
\ No newline at end of file