diff --git a/README.md b/README.md
index 5398bbd..afbda2b 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,8 @@
 
 ```shell
 npm install --save @jiguang-ionic/jpush
+
+# npm install --save @jiguang-ionic/jpush@2.0.0 for ionic4+
 ```
 
 然后在 *app.module.ts* 中增加：