diff --git a/README.md b/README.md
index 9897acc..3e503f7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Base-server
 ## TCP request syntax
-A valid request contains a 4-byte (32-bit) big endian unsigned integer denoting the length of the data in bytes, not including the integer itself, followed by the data. Responses are formed in the same format.
+A valid request contains a 4-byte (32-bit) big endian unsigned integer denoting the length of the data in bytes, not including the integer itself, a null-byte (`00000000`), which is also not included in the length, followed by the data. Responses are formed in the same format.
 
 # Text-server
 ## Command data syntax