diff --git a/README.md b/README.md
index 918ec41..4bba093 100644
--- a/README.md
+++ b/README.md
@@ -291,8 +291,8 @@ into DataGrid is nothing more than registering it in DataGridFactory.
 (You can find documentation for some of these extensions in ``doc/en/extensions`` folder.)
 
 - Core
-- SymfonyForm
-- SymfonyDependencyInjection
+- SymfonyForm (deprecated since 1.2 because of moving to [fsi/datagrid-bundle](https://github.com/fsi-open/datagrid-bundle))
+- SymfonyDependencyInjection (deprecated since 1.2 because of moving to [fsi/datagrid-bundle](https://github.com/fsi-open/datagrid-bundle))
 - Docrtine
 - Gedmo
 
diff --git a/doc/en/extensions/symfony.md b/doc/en/extensions/symfony.md
index 75efc3c..dd2d012 100644
--- a/doc/en/extensions/symfony.md
+++ b/doc/en/extensions/symfony.md
@@ -1,5 +1,8 @@
 # DataGrid Extension SymfonyForm #
 
+This extension is deprecated since 1.2 because it was moved to
+[fsi/datagrid-bundle](https://github.com/fsi-open/datagrid-bundle).
+
 ## Column Types provided by extension ##
 
 ``FSi\Component\DataGrid\Extension\Symfony\ColumnType\Action``