diff --git a/atlas/views.py b/atlas/views.py
index bbcdbf61..b19b9e56 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -360,7 +360,7 @@ class AtlasCreate(AtlasCreateBase):
 
 
 class AtlasUpdate(
-    RevisionMixin, LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView
+    AtlasCreateBase, AuthorOrCheckerRequiredMixin, UpdateView
 ):
     model = Case
     form_class = CaseForm