diff --git a/requirements.txt b/requirements.txt
index 64fbddc..df6847d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ ecdsa==0.13.3
 Flask==1.0
 future==0.15.2
 itsdangerous==0.24
-Jinja2==2.8
+Jinja2==2.11.3
 MarkupSafe==0.23
 Naked==0.1.31
 nexmo==2.0.0