diff --git a/DEPRECATED.md b/DEPRECATED.md
index a2e80b2fce3..8328b68d79c 100644
--- a/DEPRECATED.md
+++ b/DEPRECATED.md
@@ -243,8 +243,8 @@ You can use the static helper methods such as `System::loadLanguageFile()` or
 
 ## Constants
 
-The constants `TL_ROOT`, `TL_MODE`, `TL_START`, `TL_SCRIPT` and `TL_REFERER_ID`
-have been deprecated and will be removed in Contao 5.0.
+The constants `TL_ROOT`, `TL_MODE`, `TL_START`, `TL_SCRIPT`, `TL_REFERER_ID` and
+`REQUEST_TOKEN` have been deprecated and will be removed in Contao 5.0.
 
 Use the `kernel.project_dir` instead of `TL_ROOT`:
 
@@ -299,6 +299,12 @@ Use the the request attribute `_contao_referer_id` instead of `TL_REFERER_ID`:
 $refererId = System::getContainer()->get('request_stack')->getCurrentRequest()->get('_contao_referer_id');
 ```
 
+Use the `contao.csrf.token_manager` service instead of `REQUEST_TOKEN`:
+
+```php
+$requestToken = System::getContainer()->get('contao.csrf.token_manager')->getDefaultTokenValue();
+```
+
 ## PHP entry points
 
 Contao 4 only uses a single PHP entry point, namely the `index.php` or