diff --git a/README.md b/README.md
index 0eb9fc2..88335f0 100644
--- a/README.md
+++ b/README.md
@@ -533,6 +533,7 @@ The Request body must have a notifications array. The following is a parameter t
 | data                    | string array | extensible partition                                                                              | -        |                                                               |
 | retry                   | int          | retry send notification if fail response from server. Value must be small than `max_retry` field. | -        |                                                               |
 | topic                   | string       | send messages to topics                                                                           |          |                                                               |
+| image                   | string       | image url to show in notification                                                                 | -        | only Android                                                  |
 | api_key                 | string       | api key for firebase cloud message                                                                | -        | only Android                                                  |
 | to                      | string       | The value must be a registration token, notification key, or topic.                               | -        | only Android                                                  |
 | collapse_key            | string       | a key for collapsing notifications                                                                | -        | only Android                                                  |
@@ -543,6 +544,7 @@ The Request body must have a notifications array. The following is a parameter t
 | notification            | string array | payload of a FCM message                                                                          | -        | only Android. See the [detail](#android-notification-payload) |
 | expiration              | int          | expiration for notification                                                                       | -        | only iOS                                                      |
 | apns_id                 | string       | A canonical UUID that identifies the notification                                                 | -        | only iOS                                                      |
+| collapse_id             | string       | An identifier you use to coalesce multiple notifications into a single notification for the user  | -        | only iOS                                                      |
 | push_type               | string       | The type of the notification. The value of this header is alert or background.                    | -        | only iOS                                                      |
 | badge                   | int          | badge count                                                                                       | -        | only iOS                                                      |
 | category                | string       | the UIMutableUserNotificationCategory object                                                      | -        | only iOS                                                      |
@@ -914,7 +916,7 @@ func main() {
 }
 ```
 
-See the Node.js example and see more detail frome [README](rpc/example/node/README.md): 
+See the Node.js example and see more detail frome [README](rpc/example/node/README.md):
 
 [embedmd]:# (rpc/example/node/client.js js)
 ```js