diff --git a/contracts/ontology/requirements.txt b/contracts/ontology/requirements.txt
index 64be074..b88217f 100644
--- a/contracts/ontology/requirements.txt
+++ b/contracts/ontology/requirements.txt
@@ -32,7 +32,7 @@ lazr.uri==1.0.3
 logzero==1.5.0
 louis==3.5.0
 macaroonbakery==1.1.3
-Mako==1.0.7
+Mako==1.2.2
 MarkupSafe==1.0
 mnemonic==0.18
 multidict==4.5.2