diff --git a/requirements.txt b/requirements.txt
index e6e9b329..dceca88a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,3 +11,4 @@ oslo.concurrency>=3.8.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
 PyYAML>=3.10.0 # MIT
 jsonschema>=2.0.0,<3.0.0,!=2.5.0  # MIT
+pyudev>=0.16.1 # LGPLv2.1+