diff --git a/UPGRADE-4.3.md b/UPGRADE-4.3.md
index a0d5e52b17..79b38e2e7d 100644
--- a/UPGRADE-4.3.md
+++ b/UPGRADE-4.3.md
@@ -50,6 +50,12 @@ HttpFoundation
  * The `FileinfoMimeTypeGuesser` class has been deprecated,
    use `Symfony\Component\Mime\FileinfoMimeTypeGuesser` instead.
 
+Routing
+-------
+
+ * The `generator_base_class`, `generator_cache_class`, `matcher_base_class`, and `matcher_cache_class` router
+   options have been deprecated.
+
 Security
 --------
 
diff --git a/UPGRADE-5.0.md b/UPGRADE-5.0.md
index a959f2d06a..1c729e2afc 100644
--- a/UPGRADE-5.0.md
+++ b/UPGRADE-5.0.md
@@ -223,6 +223,12 @@ Process
    $process = Process::fromShellCommandline('ls -l');
    ```
 
+Routing
+-------
+
+ * The `generator_base_class`, `generator_cache_class`, `matcher_base_class`, and `matcher_cache_class` router
+   options have been removed.
+
 Security
 --------