README.md in sendgrid4r-0.0.4 vs README.md in sendgrid4r-0.0.5

@@ -169,10 +169,10 @@
 ```
 
 ##### DELETE
 Remove an IP address from a pool.
 ```Ruby
-client.delete_ip_from_pool("xxx.xxx.xxx.xxx")
+client.delete_ip_from_pool("pool_name", "xxx.xxx.xxx.xxx")
 ```
 
 #### IP Pools
 
 ##### GET