diff --git a/config/requirements.txt b/config/requirements.txt
index 1f8474d..f94e0d3 100644
--- a/config/requirements.txt
+++ b/config/requirements.txt
@@ -47,6 +47,7 @@ simplejson>=3.8.1
 six>=1.10
 # Freeze until all problems with 1.4 are solved
 sqlalchemy==1.3.*
+cachetools<4
 # More recent version of stomp are python 3 only
 stomp.py==4.1.22
 subprocess32