diff --git a/INSTALL.md b/INSTALL.md
index ae1f0b8..d68c50c 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,7 +1,8 @@
 ## Installation
 
 1. Install Module
-
+    
+    Run the following command. For example, the Magic Mirror directory is `~/MagicMirror`.
     ```sh
     cd ~/MagicMirror/modules
     git clone https://github.com/hermanho/MMM-GooglePhotos.git
@@ -19,6 +20,16 @@
 
 1. Add MMM-GooglePhotos module config in ~/MagicMirror/config/config.js
 
+
+## Upgrade
+
+  Run the following command. For example, the Magic Mirror directory is `~/MagicMirror`.
+  ```sh
+  cd ~/MagicMirror/modules/MMM-GooglePhotos
+  git pull
+  npm run install-prod
+  ```
+
 ## Authorise OAuth Token
 
 ### Get `token.json`
diff --git a/README.md b/README.md
index 4eb447d..368a547 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Display your photos from album of Google Photos on [MagicMirror²](https://githu
 
 ![screenshot](images/screenshot2.png)
 
-## Installation
+## Installation & Upgrade
 
 [INSTALL.md](INSTALL.md)