diff --git a/physics/admin.py b/physics/admin.py
index 5736eeca..1fd2af27 100644
--- a/physics/admin.py
+++ b/physics/admin.py
@@ -23,7 +23,7 @@ class QuestionAdmin(VersionAdmin):
     #)
 
 class ExamAdmin(VersionAdmin):
-    pass
+    save_as = True
 
 admin.site.register(Category)
 admin.site.register(Question, QuestionAdmin)