diff --git a/requirements.txt b/requirements.txt
index c432aa60..a97f231c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@
 
 ovs>=2.6.1 # Apache-2.0
 pbr>=2.0.0 # Apache-2.0
+tenacity>=3.2.1 # Apache-2.0