diff --git a/apps/collection/models.py b/apps/collection/models.py
index 8024effb..91173ed0 100644
--- a/apps/collection/models.py
+++ b/apps/collection/models.py
@@ -110,7 +110,7 @@ class Collection(ProjectBaseMixin, CollectionDateMixin,
         """Return list of related objects."""
         related_objects = []
         # get related objects
-        for related_object in self._meta.related_objects:
+        for related_object in self._meta.related_objects.with_base_related():
             related_objects.append(related_object)
         return related_objects
 
diff --git a/apps/collection/views/back.py b/apps/collection/views/back.py
index 032bafb3..73fb7b18 100644
--- a/apps/collection/views/back.py
+++ b/apps/collection/views/back.py
@@ -21,7 +21,7 @@ class CollectionViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
 
     def get_queryset(self):
         """Overridden method 'get_queryset'."""
-        qs = models.Collection.objects.all().order_by('-created')
+        qs = models.Collection.objects.all().order_by('-created').with_base_related()
         if self.request.country_code:
             qs = qs.by_country_code(self.request.country_code)
         return qs