diff --git a/requirements.txt b/requirements.txt
index c09ecf8..6c46cde 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -117,7 +117,7 @@ llvmlite==0.24.0
 Logbook==0.12.5
 lru-dict==1.1.6
 lxml==4.2.1
-Mako==1.0.7
+Mako==1.2.2
 MarkupSafe==1.0
 matplotlib==2.2.2
 mistune==0.8.3