diff --git a/README.md b/README.md
index 918c40b..408cc70 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 Overview
 --------
-This branch (hydro-devel) is intended for ROS Hydro and above, and uses the Catkin buildsystem. It may also be compatible with ROS Groovy.
+This branch (indigo-devel) is intended for ROS Indigo and above, and uses the Catkin buildsystem. It may also be compatible with ROS Hydro.
 
 This ROS stack includes an Arduino library (called ROSArduinoBridge) and a collection of ROS packages for controlling an Arduino-based robot using standard ROS messages and services.  The stack does **not** depend on ROS Serial.