diff --git a/requirements.txt b/requirements.txt
index 3965520..ea72023 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ jupyter-core==4.4.0
 lipsum==0.1.2
 Logbook==1.4.0
 lxml==4.2.4
-Mako==1.0.7
+Mako==1.2.2
 Markdown==2.6.11
 MarkupSafe==1.0
 micawber==0.3.5