diff --git a/requirements.txt b/requirements.txt
index 09f78ec5ab..9facf86158 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ colorama
 pyserial
 prettytable
 Jinja2
-IntelHex
\ No newline at end of file
+IntelHex
+mbed-ls
\ No newline at end of file