diff --git a/etc/requirements.txt b/etc/requirements.txt
index 4993d549..bef0ebf6 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -18,3 +18,4 @@ setproctitle==1.1.6
 Logbook==0.3
 
 blist==1.3.4
+psutil==0.4.1