diff --git a/requirements.txt b/requirements.txt
index 418af5635..cba4de553 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,6 +29,7 @@ python-dateutil==2.8.1
 python-Levenshtein==0.12.0
 pytz==2020.4
 PyYAML==5.4.1
+redis==3.5.3
 regex==2020.11.13
 sgmllib3k==1.0.0
 six==1.15.0