diff --git a/README.md b/README.md
index 5e0b769..69e6bb0 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,8 @@ Inputs
 1. [Original discussion at the ftcommunity.de forum](http://forum.ftcommunity.de/viewtopic.php?f=8&t=1655).
 
 ##Version history:
+V0.3 - 11.08.2016. Changed version.firmware.part.b by one to make it compatible with RoboPro 4.2.3.
+
 V0.2 - 03.09.2015. Changed output pins map. Now Arduino's pins 6-13 coresponds to ROBO TX pins O1-O8.
                    Changed input pins map. Now Arduino's pins A3-A4 coresponds to ROBO TX pins I7 and I8.
                    This version tested with ROBO Pro 4.1.8, Arduino IDE 1.0.6 and ARUDINO UNO R3 board.