diff --git a/rtd-requirements.txt b/rtd-requirements.txt
index 0078bb8..c8c9675 100644
--- a/rtd-requirements.txt
+++ b/rtd-requirements.txt
@@ -97,7 +97,7 @@ jsonresolver==0.2.1
 jsonschema==3.0.1
 kombu==4.6.3
 limits==1.3
-Mako==1.0.13
+Mako==1.2.2
 MarkupSafe==1.1.1
 marshmallow==2.19.5
 maxminddb==1.5.0