diff --git a/redux.md b/redux.md
index 22b0f8e72..ad3943d8e 100644
--- a/redux.md
+++ b/redux.md
@@ -2,7 +2,7 @@
 title: Redux
 category: React
 layout: 2017/sheet
-updated: 2017-08-30
+updated: 2018-01-17
 weight: -3
 ---
 
@@ -137,6 +137,16 @@ export default connect(
 
 Same as above, but shorter.
 
+### Combining reducers
+
+```js
+const reducer = combineReducers({
+  counter, user, store
+})
+```
+
+Combines multiple reducers into one reducer function. See: [combineReducers](https://redux.js.org/docs/api/combineReducers.html) _(redux.js.org)_
+
 ## Middleware
 
 ### Signature