diff --git a/requirements.txt b/requirements.txt
index 4790044..5dfbf6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-mako==1.0.6
+mako==1.2.2
 matplotlib==2.0.0
 numpy==1.12.0
 protobuf==3.2.0