diff --git a/spec.md b/spec.md
index b5cbcc2d..1fdbfd7e 100644
--- a/spec.md
+++ b/spec.md
@@ -1,7 +1,7 @@
 # HoleyBytes ISA Specification
 
 # Bytecode format
-- Holey Bytes program should start with following magic: `0xAB1E0B`
+- Holey Bytes program should start with following magic: `[0xAB, 0x1E, 0x0B]`
 - All numbers are encoded little-endian
 - There is 256 registers, they are represented by a byte
 - Immediate values are 64 bit