diff --git a/README.md b/README.md
index 886347e..2408daa 100644
--- a/README.md
+++ b/README.md
@@ -160,7 +160,7 @@ ruby eeprom.rb
 ~~~
 
 this will create the `eeprom.bin` binary file.
-feel free to adjust the configuration in the generating script.
+feel free to adjust the configuration in the generating script, such as the serial number.
 
 after having soldered all the parts on the board, connect a programmer (here a MiniPRO TL866xx) on the J4 pin header to write the AT24C02 EEPROM: