diff --git a/physics/admin.py b/physics/admin.py
index 58319c91..5736eeca 100644
--- a/physics/admin.py
+++ b/physics/admin.py
@@ -22,9 +22,11 @@ class QuestionAdmin(VersionAdmin):
     #("b", "b_answer"),
     #)
 
+class ExamAdmin(VersionAdmin):
+    pass
 
 admin.site.register(Category)
 admin.site.register(Question, QuestionAdmin)
-admin.site.register(Exam)
+admin.site.register(Exam, ExamAdmin)
 admin.site.register(CidUserAnswer)