README.md in http-protocol-0.3.2 vs README.md in http-protocol-0.4.0

@@ -21,14 +21,14 @@
 ## Usage
 
 ### HTTP2
 
 ```ruby
-framer = HTTP::Protocol::HTTP2::Framer.new(io)
+framer = HTTP::Protocol::HTTP2::Framer.new(stream)
 
 frame = framer.read_frame
 
-frame.write(io)
+frame.write(stream)
 ```
 
 ## Contributing
 
 1. Fork it