diff --git a/requirements.txt b/requirements.txt
index 6c327b3..d3add8a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,7 @@ six >= 1.15.0, < 2
 tornado >= 5.1.1, < 6
 whois >= 0.9.4, < 1
 influxdb >= 5.3.1, < 6
+msgpack >= 1.0, < 2
 
 rkd>=2.2, <3
 rkd-python>=2.2, <3