diff --git a/README.md b/README.md
index 731d8be..7ecf015 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A new version for Python 3.5, pymata_aio, can be found [here](https://github.com
 The API can be viewed on the [wiki](https://github.com/MrYsLab/PyMata/wiki).
 
 ## Major features
-* __Implements the entire Firmata 2.4.1 protocol.__
+* __Implements the entire Firmata 2.5.1 protocol.__
 * __Python 2.7+ and Python 3.4+__ compatibility through a shared code set. (If you are running Python 3.4 on Linux, please see note below).
 * Easy to use and intuitive __API__. You can view the [PyMata API Documentation here](https://htmlpreview.github.io/?https://raw.githubusercontent.com/MrYsLab/PyMata/master/documentation/html/pymata.m.html) or view in the Documentation/html directory.
 * Custom support for __stepper motors, Sonar Ping Devices (HC-SR04), Piezo devices and Rotary Encoders__.