diff --git a/README.md b/README.md
index cdf5f95..609146f 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Python based Telegram bot to monitor and control the raspberry pi.
   ```
  - Run *gpiotel20.py* as sudo 
  - Try out the commands given below in the Telegram bot chat (see Usage section below)
- - GPIO of led1 and led2 set as 5 and 10 respectively.
+ - GPIO of led1 and led2 set as 5 and 10 respectively(BCM numbering).
 ## Commands: