diff --git a/requirements.txt b/requirements.txt
index 4a166ab..cdf4cc3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ gevent-websocket==0.10.1
 greenlet==0.4.12
 gunicorn==19.7.1
 itsdangerous==0.24
-Jinja2==2.9.6
+Jinja2==2.11.3
 MarkupSafe==1.0
 numpy==1.13.1
 olefile==0.44