diff --git a/requirements.txt b/requirements.txt
index 47019b2..ce41c2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ jupyter-client==6.1.3
 jupyter-console==6.1.0
 jupyter-core==4.6.3
 lazy-object-proxy==1.4.3
-Mako==1.1.3
+Mako==1.2.2
 MarkupSafe==1.1.1
 mccabe==0.6.1
 mistune==0.8.4