diff --git a/requirements.txt b/requirements.txt
index 0b91831..f0a8893 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,11 @@
 arrow
 aiohttp
-msgpack-python
+msgpack-python > 0.5
 psycopg2
 python-dateutil
 vcversioner
 PyYAML
 requests
 Flask
 systemd-python
 decorator