diff --git a/Volume-Server-API.md b/Volume-Server-API.md
index 8e6eb7b..aa4dc24 100644
--- a/Volume-Server-API.md
+++ b/Volume-Server-API.md
@@ -18,7 +18,7 @@ curl -F file=@/home/chris/myphoto.jpg http://localhost:9333/submit
 {"fid":"3,01fbe0dc6f1f38","fileName":"myphoto.jpg","fileUrl":"localhost:8080/3,01fbe0dc6f1f38","size":68231}
 ```
 
-This API is just for convenience. The master server would get an file id and store the file to the right volume server.
+This API is just for convenience. The master server would get a file id and store the file to the right volume server.
 It is a convenient API and does not support different parameters when assigning file id. (or you can add the support and make a pull request.)
 
 ### Delete File