diff --git a/wagtail/contrib/settings/views.py b/wagtail/contrib/settings/views.py
index 3b105257f5..4c9aac018b 100644
--- a/wagtail/contrib/settings/views.py
+++ b/wagtail/contrib/settings/views.py
@@ -1,7 +1,8 @@
+from functools import lru_cache
+
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
 from django.shortcuts import get_object_or_404, redirect, render
-from django.utils.lru_cache import lru_cache
 from django.utils.text import capfirst
 from django.utils.translation import ugettext as _
 
diff --git a/wagtail/images/checks.py b/wagtail/images/checks.py
index b463af38c2..d47d3a58f8 100644
--- a/wagtail/images/checks.py
+++ b/wagtail/images/checks.py
@@ -1,7 +1,7 @@
+from functools import lru_cache
 import os
 
 from django.core.checks import Warning, register
-from django.utils.lru_cache import lru_cache
 from willow.image import Image