diff --git a/extra_views/advanced.py b/extra_views/advanced.py
index 02a5702..cf89c6e 100644
--- a/extra_views/advanced.py
+++ b/extra_views/advanced.py
@@ -1,4 +1,4 @@
-from copy import deepcopy
+from copy import copy
 
 from django.contrib import messages
 from django.forms.formsets import all_valid
@@ -49,7 +49,7 @@ def get_inlines(self):
         """
         Returns the inline formset classes
         """
-        return deepcopy(self.inlines)
+        return copy(self.inlines)
 
     def forms_valid(self, form, inlines):
         """
@@ -193,7 +193,7 @@ def get_inlines_names(self):
         """
         Returns a list of names of context variables for each inline in `inlines`.
         """
-        return deepcopy(self.inlines_names)
+        return copy(self.inlines_names)
 
     def get_context_data(self, **kwargs):
         """