diff --git a/graphene_django_extras/paginations/pagination.py b/graphene_django_extras/paginations/pagination.py
index fd93460..57a93e5 100644
--- a/graphene_django_extras/paginations/pagination.py
+++ b/graphene_django_extras/paginations/pagination.py
@@ -160,7 +160,7 @@ def paginate_queryset(self, qs, **kwargs):
         page = kwargs.pop(self.page_query_param, 1)
         if self.page_size_query_param:
             page_size = _nonzero_int(
-                kwargs.get(self.page_size_query_param, None),
+                kwargs.get(self.page_size_query_param, self.page_size),
                 strict=True,
                 cutoff=self.max_page_size
             )