diff --git a/requirements.txt b/requirements.txt
index cc13aa9..f867bb2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,5 @@ oslo.log>=3.36.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
 oslo.policy>=1.30.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
+patrole>=0.4.0 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0