diff --git a/playground_flask/requirements.txt b/playground_flask/requirements.txt
index cfcf890..6a187f4 100644
--- a/playground_flask/requirements.txt
+++ b/playground_flask/requirements.txt
@@ -6,7 +6,7 @@ Flask-Moment==0.2.1
 Flask-SQLAlchemy==1.0
 Flask-Script==0.6.6
 Flask-WTF==0.9.4
-Jinja2==2.7.1
+Jinja2==2.11.3
 Mako==0.9.1
 MarkupSafe==0.18
 SQLAlchemy==0.9.9
diff --git a/requirements.txt b/requirements.txt
index 4abdbcb..855712a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ ipywidgets==4.1.0
 itsdangerous==0.23
 jdcal==1.0
 jedi==0.9.0
-Jinja2==2.7.1
+Jinja2==2.11.3
 jsonschema==2.4.0
 jupyter==1.0.0
 jupyter-client==4.1.1