diff --git a/requirements.txt b/requirements.txt
index 9147754401a5c01da6573136aa12d46a974e5151..df84556e699635d017efe4589467cce358430b9c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,5 +8,6 @@ influxdb
 tabulate
 h5py
 unittest-xml-reporting
+zmq
 ./cal_tools
 .