diff --git a/PROTOCOL.md b/PROTOCOL.md
index 029f1ea..938fd2d 100644
--- a/PROTOCOL.md
+++ b/PROTOCOL.md
@@ -15,7 +15,7 @@ Client sends:
 
 Client sends:
 
-- Byte `0x01`
+- Byte `0x00`
 
 Server sends: