diff --git a/requirements.txt b/requirements.txt
index e47286f..a885eb3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,8 @@ bluesky
 bluesky-kafka
 databroker
 event-model
+msgpack >=1.0.0
+msgpack-numpy
 numpy
 ophyd
 pymongo