diff --git a/requirements.txt b/requirements.txt
index 0dd9770..0a2ad5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -90,7 +90,7 @@ kiwisolver==1.1.0
 lazy-object-proxy==1.5.1
 locket==0.2.0
 lockfile==0.12.2
-Mako==1.2.2
+Mako==1.3.12
 Markdown==3.1.1
 MarkupSafe==1.1.1
 marshmallow==2.21.0