diff --git a/README.md b/README.md
index f4472d2..a5748e5 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ FCM is just a demo of Android Application which implement Firebase Cloud Messagi
 
 ## Prerequisites
 * Supported Android 2.3 (Gingerbread) and newer
-* Google Play services 9.2.1 or newer
+* Google Play services 9.4.0 or newer
 * Android Studio 1.5 or higher
 * google-services.json in app-level folder