diff --git a/README.md b/README.md
index fd7243ef58f0bdc22875f77805f8952257c81c57..6ea062bd10da35f2188d7950c3c0f1302c4e5a4f 100644
--- a/README.md
+++ b/README.md
@@ -233,9 +233,11 @@ Edit `AppDelegate.m`:
 ### Add Capabilities
 - Select your project **Capabilities** and enable:
   - **Push Notifications**
-  - **Keychain Sharing** 
   - *Background Modes* > **Remote notifications**.
 
+### FirebaseAppDelegateProxyEnabled
+This instruction assumes that you have FirebaseAppDelegateProxyEnabled=YES so that Firebase will hook on push notification registration events. If you turn this flag off, you will be on your own to manage APNS tokens and link with Firebase token.
+
 ## Setup Local Notifications
 NOTE: local notification does NOT have any dependency on FCM library but you still need to include Firebase to compile. If there are enough demand to use this functionality alone, I will separate it out into another repo