diff --git a/README.md b/README.md
index acff08e..b3ada71 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,23 @@ class CategoryAdmin(TreeNodeModelAdmin):
 admin.site.register(Category, CategoryAdmin)
 ```
 
+---
+
+### `settings.py`
+You can use a custom cache backend by adding a `treenode` entry to `settings.CACHES`, otherwise the default cache backend will be used.
+
+```python
+CACHES = {
+    'default': {
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': '...',
+    },
+    'treenode': {
+        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
+    },
+}
+```
+
 ## Usage
 
 ### Methods/Properties
diff --git a/treenode/version.py b/treenode/version.py
index fd64425..f7f5ec6 100644
--- a/treenode/version.py
+++ b/treenode/version.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 
-__version__ = '0.14.2'
+__version__ = '0.15.0'