diff --git a/requirements.txt b/requirements.txt
index d821df819e..61fa9fb761 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,3 +22,4 @@ pyelftools>=0.24,<=0.25
 git+https://github.com/armmbed/manifest-tool.git@v1.4.6
 icetea>=1.2.1,<1.3
 pycryptodome>=3.7.2,<=3.7.3
+pyusb>=1.0.0