diff --git a/requirements.txt b/requirements.txt
index 6ea6903..b827432 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ Flask==0.12
 future==0.16.0
 idna==2.6
 itsdangerous==0.24
-Jinja2==2.9.5
+Jinja2==2.11.3
 MarkupSafe==0.23
 olefile==0.44
 packaging==16.8