diff --git a/fastboot/README.md b/fastboot/README.md
index 28e623ca7..6996d4a00 100644
--- a/fastboot/README.md
+++ b/fastboot/README.md
@@ -25,7 +25,7 @@ Linux, macOS, or Windows.
 ## Transport and Framing
 
 1. Host sends a command, which is an ascii string in a single
-   packet no greater than 64 bytes.
+   packet no greater than 4096 bytes.
 
 2. Client response with a single packet no greater than 256 bytes.
    The first four bytes of the response are "OKAY", "FAIL", "DATA",