diff --git a/UPGRADE 2.1 b/UPGRADE 2.1
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--- /dev/null
+++ b/UPGRADE 2.1	
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+UPGRADE 2.1
+=========
+
+### JQuery Chosen
+
+    widget option cannot specify the choice type anymore, you have to append the widget in the type name instead :
+
+    Before:
+
+    ```
+    $formBuilder
+        ->add('country', 'genemu_jquerychosen', array(
+            'widget' => 'country',
+        ));
+    ```
+
+    After:
+
+    ```
+    $formBuilder->add('country', 'genemu_jquerychosen_country');
+    ```