diff --git a/etc/requirements.txt b/etc/requirements.txt
index 3163bc7d..4993d549 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -16,3 +16,5 @@ setproctitle==1.1.6
 
 # Logging
 Logbook==0.3
+
+blist==1.3.4