diff --git a/protocol.md b/protocol.md
--- a/protocol.md
+++ b/protocol.md
@@ -1,4 +1,4 @@
-# Protocol #
+# Protocol v0.1 #
 
 [Communication protocol proposal. Not yet fully implemented and still expected to change.]
 
@@ -40,7 +40,7 @@ hash
 - [(int) i0, ...] index: list of requested node keys from the HashTree
 
 data
-- (int) index: requested data block number in the data file. Returns blockSize bytes starting at blockSize * index.
+- [(int) i0, ...] index: list of requested data blocks from the data file. Returns blockSize bytes starting at blockSize * i.
 
 #### Responses ####
 - [send](#send)