diff --git a/README.md b/README.md
index 7fea6dc..64aa004 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ $ curl -X POST --data-binary @RICKROLL.txt 0.0.0.0:7745 -i -H 'Content-Type: app
 
 ### Expiration time
 
-To customize the expiration time, use the header `X-Expire: <seconds>`, or a GET argument `?expire=<seconds>` e.g. 
+To customize the expiration time, use the header `X-Expire: <secs>`, or a URL parameter `?expire=<secs>` e.g. 
 
 ```
 $ curl -X POST --data-binary @RICKROLL.txt 0.0.0.0:7745 -i -H 'X-Expire: 60'
@@ -65,12 +65,12 @@ Send the token as the `X-Secret` header, or GET argument `?secret=....`
 
 File is updated by sending a `PUT` request to the file's URL.
 
-The `PUT` request can change file expiration (`X-Expire: <secs>` or GET arg `expire`), 
-update its `Content-Type`, or replace its content.
+The `PUT` request can change file expiration (`X-Expire: <secs>` or a URL parameter `?expire=<secs>`), 
+update its `Content-Type` (by sending the header), or replace its content.
 
 Note that sending `PUT` with empty body will *not* clear the file, in that case the file content is
-not changed at all. This can be used to extend file's expiration without changing it in any other way
-(by sending the `X-Expire` header). 
+not changed at all. This can be used to extend a file's expiration without changing it in any other way
+(by sending the `X-Expire` header).
 
 ## Deleting a file