diff --git a/README.md b/README.md
index 046d88d..0b5dfd2 100644
--- a/README.md
+++ b/README.md
@@ -169,11 +169,19 @@ enum RUpgradeFlavor {
 ```
 
 #### 4. Install Apk
+
+- use download id install
 ```dart
     void install() async {
       bool isSuccess=await RUpgrade.install(id);
     }
 ```
+- use file path install
+```dart
+    void installByPath(String path) async {
+  bool isSuccess=await RUpgrade.installByPath(path);
+}
+```
 
 #### 5. Pause Download
 ```dart