diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37eeddf0..ab04714c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,10 +4,10 @@
 - [new] using `AttachmentPayload` to send cached attachment:
 
 ```js
-client.sendImage(USER_ID, { attachmend_id: '55688' });
-client.sendAudio(USER_ID, { attachmend_id: '55688' });
-client.sendVideo(USER_ID, { attachmend_id: '55688' });
-client.sendFile(USER_ID, { attachmend_id: '55688' });
+client.sendImage(USER_ID, { attachment_id: '55688' });
+client.sendAudio(USER_ID, { attachment_id: '55688' });
+client.sendVideo(USER_ID, { attachment_id: '55688' });
+client.sendFile(USER_ID, { attachment_id: '55688' });
 ```
 
 0.3.0 / 2017-08-29
diff --git a/packages/messaging-api-messenger/README.md b/packages/messaging-api-messenger/README.md
index 6080e443..5cb66d01 100644
--- a/packages/messaging-api-messenger/README.md
+++ b/packages/messaging-api-messenger/README.md
@@ -206,7 +206,7 @@ client.sendAudio(USER_ID, 'https://example.com/audio.mp3');
 using `AttachmentPayload` to send cached attachment:
 
 ```js
-client.sendAudio(USER_ID, { attachmend_id: '55688' });
+client.sendAudio(USER_ID, { attachment_id: '55688' });
 ```
 
 or using `ReadStream` created from local file:
@@ -244,7 +244,7 @@ client.sendImage(USER_ID, 'https://example.com/vr.jpg');
 using `AttachmentPayload` to send cached attachment:
 
 ```js
-client.sendImage(USER_ID, { attachmend_id: '55688' });
+client.sendImage(USER_ID, { attachment_id: '55688' });
 ```
 
 or using `ReadStream` created from local file:
@@ -282,7 +282,7 @@ client.sendVideo(USER_ID, 'https://example.com/video.mp4');
 using `AttachmentPayload` to send cached attachment:
 
 ```js
-client.sendVideo(USER_ID, { attachmend_id: '55688' });
+client.sendVideo(USER_ID, { attachment_id: '55688' });
 ```
 
 or using `ReadStream` created from local file:
@@ -320,7 +320,7 @@ client.sendFile(USER_ID, 'https://example.com/receipt.pdf');
 using `AttachmentPayload` to send cached attachment:
 
 ```js
-client.sendFile(USER_ID, { attachmend_id: '55688' });
+client.sendFile(USER_ID, { attachment_id: '55688' });
 ```
 
 or using `ReadStream` created from local file: