diff --git a/UPGRADE-3.2.md b/UPGRADE-3.2.md
index f90b5c885a..8da6fd3f14 100644
--- a/UPGRADE-3.2.md
+++ b/UPGRADE-3.2.md
@@ -94,6 +94,12 @@ HttpFoundation
      - `isInvalid`/`isSuccessful`/`isRedirection`/`isClientError`/`isServerError`
      - `isOk`/`isForbidden`/`isNotFound`/`isRedirect`/`isEmpty`
 
+TwigBridge
+----------
+
+ * Deprecated the possibility to inject the Form Twig Renderer into the form
+   extension. Inject it into the `TwigRendererEngine` instead.
+
 Validator
 ---------
 
diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
index e3f82ab74b..93c93f8b2b 100644
--- a/UPGRADE-4.0.md
+++ b/UPGRADE-4.0.md
@@ -175,6 +175,12 @@ Translation
 
  * Removed the backup feature from the file dumper classes.
 
+TwigBridge
+----------
+
+ * The possibility to inject the Form Twig Renderer into the form extension
+   has been removed. Inject it into the `TwigRendererEngine` instead.
+
 Yaml
 ----