diff --git a/requirements.txt b/requirements.txt
index 8a43f87..98bc82c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,3 +33,4 @@ WSME>=0.6
 Jinja2
 oslo.messaging>=1.4.0.0a3
 retrying>=1.2.2 # Apache-2.0
+posix_ipc